Merge branch 'develop' into plot_commands

docs/backtesting.md

@@ -79,18 +79,18 @@ freqtrade backtesting --datadir user_data/data/bittrex-20180101
 #### With a (custom) strategy file
 
 ```bash
-freqtrade -s TestStrategy backtesting
+freqtrade -s SampleStrategy backtesting
 ```
 
-Where `-s TestStrategy` refers to the class name within the strategy file `test_strategy.py` found in the `freqtrade/user_data/strategies` directory.
+Where `-s SampleStrategy` refers to the class name within the strategy file `sample_strategy.py` found in the `freqtrade/user_data/strategies` directory.
 
 #### Comparing multiple Strategies
 
 ```bash
-freqtrade backtesting --strategy-list TestStrategy1 AwesomeStrategy --ticker-interval 5m
+freqtrade backtesting --strategy-list SampleStrategy1 AwesomeStrategy --ticker-interval 5m
 ```
 
-Where `TestStrategy1` and `AwesomeStrategy` refer to class names of strategies.
+Where `SampleStrategy1` and `AwesomeStrategy` refer to class names of strategies.
 
 #### Exporting trades to file
 
@@ -103,7 +103,7 @@ The exported trades can be used for [further analysis](#further-backtest-result-
 #### Exporting trades to file specifying a custom filename
 
 ```bash
-freqtrade backtesting --export trades --export-filename=backtest_teststrategy.json
+freqtrade backtesting --export trades --export-filename=backtest_samplestrategy.json
 ```
 
 #### Running backtest with smaller testset

docs/configuration.md

@@ -61,8 +61,9 @@ Mandatory parameters are marked as **Required**.
 | `order_time_in_force` | None | Configure time in force for buy and sell orders. [More information below](#understand-order_time_in_force). [Strategy Override](#parameters-in-the-strategy).
 | `exchange.name` |  | **Required.** Name of the exchange class to use. [List below](#user-content-what-values-for-exchangename).
 | `exchange.sandbox` | false | Use the 'sandbox' version of the exchange, where the exchange provides a sandbox for risk-free integration. See [here](sandbox-testing.md) in more details.
-| `exchange.key` | '' | API key to use for the exchange. Only required when you are in production mode.
+| `exchange.key` | '' | API key to use for the exchange. Only required when you are in production mode. ***Keep it in secrete, do not disclose publicly.***
-| `exchange.secret` | '' | API secret to use for the exchange. Only required when you are in production mode.
+| `exchange.secret` | '' | API secret to use for the exchange. Only required when you are in production mode. ***Keep it in secrete, do not disclose publicly.***
+| `exchange.password` | '' | API password to use for the exchange. Only required when you are in production mode and for exchanges that use password for API requests. ***Keep it in secrete, do not disclose publicly.***
 | `exchange.pair_whitelist` | [] | List of pairs to use by the bot for trading and to check for potential trades during backtesting. Can be overriden by dynamic pairlists (see [below](#dynamic-pairlists)).
 | `exchange.pair_blacklist` | [] | List of pairs the bot must absolutely avoid for trading and backtesting. Can be overriden by dynamic pairlists (see [below](#dynamic-pairlists)).
 | `exchange.ccxt_config` | None | Additional CCXT parameters passed to the regular ccxt instance. Parameters may differ from exchange to exchange and are documented in the [ccxt documentation](https://ccxt.readthedocs.io/en/latest/manual.html#instantiation)
@@ -76,8 +77,8 @@ Mandatory parameters are marked as **Required**.
 | `pairlist.method` | StaticPairList | Use static or dynamic volume-based pairlist. [More information below](#dynamic-pairlists).
 | `pairlist.config` | None | Additional configuration for dynamic pairlists. [More information below](#dynamic-pairlists).
 | `telegram.enabled` | true | **Required.** Enable or not the usage of Telegram.
-| `telegram.token` | token | Your Telegram bot token. Only required if `telegram.enabled` is `true`.
+| `telegram.token` | token | Your Telegram bot token. Only required if `telegram.enabled` is `true`. ***Keep it in secrete, do not disclose publicly.***
-| `telegram.chat_id` | chat_id | Your personal Telegram account id. Only required if `telegram.enabled` is `true`.
+| `telegram.chat_id` | chat_id | Your personal Telegram account id. Only required if `telegram.enabled` is `true`. ***Keep it in secrete, do not disclose publicly.***
 | `webhook.enabled` | false | Enable usage of Webhook notifications
 | `webhook.url` | false | URL for the webhook. Only required if `webhook.enabled` is `true`. See the [webhook documentation](webhook-config.md) for more details.
 | `webhook.webhookbuy` | false | Payload to send on buy. Only required if `webhook.enabled` is `true`. See the [webhook documentationV](webhook-config.md) for more details.

docs/data-analysis.md

@@ -139,7 +139,7 @@ You can override strategy settings as demonstrated below.
 # Define some constants
 ticker_interval = "5m"
 # Name of the strategy class
-strategy_name = 'TestStrategy'
+strategy_name = 'SampleStrategy'
 # Path to user data
 user_data_dir = 'user_data'
 # Location of the strategy

docs/requirements-docs.txt

@@ -1 +1 @@
-mkdocs-material==4.4.0
+mkdocs-material==4.4.1

docs/strategy-customization.md

@@ -24,7 +24,7 @@ strategy file will be updated on Github. Put your custom strategy file
 into the directory `user_data/strategies`.
 
 Best copy the test-strategy and modify this copy to avoid having bot-updates override your changes.
-`cp  user_data/strategies/test_strategy.py user_data/strategies/awesome-strategy.py`
+`cp  user_data/strategies/sample_strategy.py user_data/strategies/awesome-strategy.py`
 
 ### Anatomy of a strategy
 
@@ -36,14 +36,19 @@ A strategy file contains all the information needed to build a good strategy:
 - Minimal ROI recommended
 - Stoploss strongly recommended
 
-The bot also include a sample strategy called `TestStrategy` you can update: `user_data/strategies/test_strategy.py`.
+The bot also include a sample strategy called `SampleStrategy` you can update: `user_data/strategies/sample_strategy.py`.
-You can test it with the parameter: `--strategy TestStrategy`
+You can test it with the parameter: `--strategy SampleStrategy`
+
+Additionally, there is an attribute called `INTERFACE_VERSION`, which defines the version of the strategy interface the bot should use.
+The current version is 2 - which is also the default when it's not set explicitly in the strategy.
+
+Future versions will require this to be set.
 
 ```bash
 freqtrade --strategy AwesomeStrategy
 ```
 
-**For the following section we will use the [user_data/strategies/test_strategy.py](https://github.com/freqtrade/freqtrade/blob/develop/user_data/strategies/test_strategy.py)
+**For the following section we will use the [user_data/strategies/sample_strategy.py](https://github.com/freqtrade/freqtrade/blob/develop/user_data/strategies/sample_strategy.py)
 file as reference.**
 
 !!! Note Strategies and Backtesting
@@ -109,9 +114,8 @@ def populate_indicators(self, dataframe: DataFrame, metadata: dict) -> DataFrame
     return dataframe
 ```
 
-
 !!! Note "Want more indicator examples?"
-    Look into the [user_data/strategies/test_strategy.py](https://github.com/freqtrade/freqtrade/blob/develop/user_data/strategies/test_strategy.py).<br/>
+    Look into the [user_data/strategies/sample_strategy.py](https://github.com/freqtrade/freqtrade/blob/develop/user_data/strategies/sample_strategy.py).
     Then uncomment indicators you need.
 
 ### Buy signal rules
@@ -122,7 +126,7 @@ It's important to always return the dataframe without removing/modifying the col
 
 This will method will also define a new column, `"buy"`, which needs to contain 1 for buys, and 0 for "no action".
 
-Sample from `user_data/strategies/test_strategy.py`:
+Sample from `user_data/strategies/sample_strategy.py`:
 
 ```python
 def populate_buy_trend(self, dataframe: DataFrame, metadata: dict) -> DataFrame:
@@ -152,7 +156,7 @@ It's important to always return the dataframe without removing/modifying the col
 
 This will method will also define a new column, `"sell"`, which needs to contain 1 for sells, and 0 for "no action".
 
-Sample from `user_data/strategies/test_strategy.py`:
+Sample from `user_data/strategies/sample_strategy.py`:
 
 ```python
 def populate_sell_trend(self, dataframe: DataFrame, metadata: dict) -> DataFrame:

freqtrade/__init__.py

@@ -11,7 +11,7 @@ class DependencyException(Exception):
 
 class OperationalException(Exception):
     """
-    Requires manual intervention.
+    Requires manual intervention and will usually stop the bot.
     This happens when an exchange returns an unexpected error during runtime
     or given configuration is invalid.
     """

freqtrade/configuration/configuration.py

@@ -4,6 +4,7 @@ This module contains the configuration class
 import logging
 import warnings
 from argparse import Namespace
+from copy import deepcopy
 from pathlib import Path
 from typing import Any, Callable, Dict, List, Optional
 
@@ -56,7 +57,7 @@ class Configuration(object):
         config: Dict[str, Any] = {}
 
         if not files:
-            return constants.MINIMAL_CONFIG.copy()
+            return deepcopy(constants.MINIMAL_CONFIG)
 
         # We expect here a list of config filenames
         for path in files:
@@ -160,6 +161,11 @@ class Configuration(object):
         Extract information for sys.argv and load directory configurations
         --user-data, --datadir
         """
+        # Check exchange parameter here - otherwise `datadir` might be wrong.
+        if "exchange" in self.args and self.args.exchange:
+            config['exchange']['name'] = self.args.exchange
+            logger.info(f"Using exchange {config['exchange']['name']}")
+
         if 'user_data_dir' in self.args and self.args.user_data_dir:
             config.update({'user_data_dir': self.args.user_data_dir})
         elif 'user_data_dir' not in config:
@@ -297,10 +303,6 @@ class Configuration(object):
         self._args_to_config(config, argname='days',
                              logstring='Detected --days: {}')
 
-        if "exchange" in self.args and self.args.exchange:
-            config['exchange']['name'] = self.args.exchange
-            logger.info(f"Using exchange {config['exchange']['name']}")
-
     def _process_runmode(self, config: Dict[str, Any]) -> None:
 
         if not self.runmode:
@@ -361,7 +363,7 @@ class Configuration(object):
             config['pairs'] = config.get('exchange', {}).get('pair_whitelist')
         else:
             # Fall back to /dl_path/pairs.json
-            pairs_file = Path(config['datadir']) / config['exchange']['name'].lower() / "pairs.json"
+            pairs_file = Path(config['datadir']) / "pairs.json"
             if pairs_file.exists():
                 with pairs_file.open('r') as f:
                     config['pairs'] = json_load(f)

freqtrade/data/history.py

@@ -280,6 +280,35 @@ def download_pair_history(datadir: Optional[Path],
         return False
 
 
+def refresh_backtest_ohlcv_data(exchange: Exchange, pairs: List[str], timeframes: List[str],
+                                dl_path: Path, timerange: TimeRange,
+                                erase=False) -> List[str]:
+    """
+    Refresh stored ohlcv data for backtesting and hyperopt operations.
+    Used by freqtrade download-data
+    :return: Pairs not available
+    """
+    pairs_not_available = []
+    for pair in pairs:
+        if pair not in exchange.markets:
+            pairs_not_available.append(pair)
+            logger.info(f"Skipping pair {pair}...")
+            continue
+        for ticker_interval in timeframes:
+
+            dl_file = pair_data_filename(dl_path, pair, ticker_interval)
+            if erase and dl_file.exists():
+                logger.info(
+                    f'Deleting existing data for pair {pair}, interval {ticker_interval}.')
+                dl_file.unlink()
+
+            logger.info(f'Downloading pair {pair}, interval {ticker_interval}.')
+            download_pair_history(datadir=dl_path, exchange=exchange,
+                                  pair=pair, ticker_interval=str(ticker_interval),
+                                  timerange=timerange)
+    return pairs_not_available
+
+
 def get_timeframe(data: Dict[str, DataFrame]) -> Tuple[arrow.Arrow, arrow.Arrow]:
     """
     Get the maximum timeframe for the given backtest data

freqtrade/exchange/binance.py

@@ -2,6 +2,9 @@
 import logging
 from typing import Dict
 
+import ccxt
+
+from freqtrade import DependencyException, OperationalException, TemporaryError
 from freqtrade.exchange import Exchange
 
 logger = logging.getLogger(__name__)
@@ -25,3 +28,53 @@ class Binance(Exchange):
         limit = min(list(filter(lambda x: limit <= x, limit_range)))
 
         return super().get_order_book(pair, limit)
+
+    def stoploss_limit(self, pair: str, amount: float, stop_price: float, rate: float) -> Dict:
+        """
+        creates a stoploss limit order.
+        this stoploss-limit is binance-specific.
+        It may work with a limited number of other exchanges, but this has not been tested yet.
+
+        """
+        ordertype = "stop_loss_limit"
+
+        stop_price = self.symbol_price_prec(pair, stop_price)
+
+        # Ensure rate is less than stop price
+        if stop_price <= rate:
+            raise OperationalException(
+                'In stoploss limit order, stop price should be more than limit price')
+
+        if self._config['dry_run']:
+            dry_order = self.dry_run_order(
+                pair, ordertype, "sell", amount, stop_price)
+            return dry_order
+
+        try:
+            params = self._params.copy()
+            params.update({'stopPrice': stop_price})
+
+            amount = self.symbol_amount_prec(pair, amount)
+
+            rate = self.symbol_price_prec(pair, rate)
+
+            order = self._api.create_order(pair, ordertype, 'sell',
+                                           amount, rate, params)
+            logger.info('stoploss limit order added for %s. '
+                        'stop price: %s. limit: %s', pair, stop_price, rate)
+            return order
+        except ccxt.InsufficientFunds as e:
+            raise DependencyException(
+                f'Insufficient funds to create {ordertype} sell order on market {pair}.'
+                f'Tried to sell amount {amount} at rate {rate}.'
+                f'Message: {e}') from e
+        except ccxt.InvalidOrder as e:
+            raise DependencyException(
+                f'Could not create {ordertype} sell order on market {pair}. '
+                f'Tried to sell amount {amount} at rate {rate}.'
+                f'Message: {e}') from e
+        except (ccxt.NetworkError, ccxt.ExchangeError) as e:
+            raise TemporaryError(
+                f'Could not place sell order due to {e.__class__.__name__}. Message: {e}') from e
+        except ccxt.BaseError as e:
+            raise OperationalException(e) from e

freqtrade/exchange/exchange.py

@@ -14,6 +14,7 @@ from typing import Any, Dict, List, Optional, Tuple
 import arrow
 import ccxt
 import ccxt.async_support as ccxt_async
+from ccxt.base.decimal_to_precision import ROUND_UP, ROUND_DOWN
 from pandas import DataFrame
 
 from freqtrade import (DependencyException, InvalidOrderException,
@@ -320,7 +321,7 @@ class Exchange(object):
         if (order_types.get("stoploss_on_exchange")
                 and not self._ft_has.get("stoploss_on_exchange", False)):
             raise OperationalException(
-                'On exchange stoploss is not supported for %s.' % self.name
+                f'On exchange stoploss is not supported for {self.name}.'
             )
 
     def validate_order_time_in_force(self, order_time_in_force: Dict) -> None:
@@ -450,30 +451,14 @@ class Exchange(object):
     def stoploss_limit(self, pair: str, amount: float, stop_price: float, rate: float) -> Dict:
         """
         creates a stoploss limit order.
-        NOTICE: it is not supported by all exchanges. only binance is tested for now.
+        Since ccxt does not unify stoploss-limit orders yet, this needs to be implemented in each
-        TODO: implementation maybe needs to be moved to the binance subclass
+        exchange's subclass.
+        The exception below should never raise, since we disallow
+        starting the bot in validate_ordertypes()
+        Note: Changes to this interface need to be applied to all sub-classes too.
         """
-        ordertype = "stop_loss_limit"
 
-        stop_price = self.symbol_price_prec(pair, stop_price)
+        raise OperationalException(f"stoploss_limit is not implemented for {self.name}.")
-
-        # Ensure rate is less than stop price
-        if stop_price <= rate:
-            raise OperationalException(
-                'In stoploss limit order, stop price should be more than limit price')
-
-        if self._config['dry_run']:
-            dry_order = self.dry_run_order(
-                pair, ordertype, "sell", amount, stop_price)
-            return dry_order
-
-        params = self._params.copy()
-        params.update({'stopPrice': stop_price})
-
-        order = self.create_order(pair, ordertype, 'sell', amount, rate, params)
-        logger.info('stoploss limit order added for %s. '
-                    'stop price: %s. limit: %s', pair, stop_price, rate)
-        return order
 
     @retrier
     def get_balance(self, currency: str) -> float:
@@ -824,11 +809,9 @@ def timeframe_to_prev_date(timeframe: str, date: datetime = None) -> datetime:
     """
     if not date:
         date = datetime.now(timezone.utc)
-    timeframe_secs = timeframe_to_seconds(timeframe)
+
-    # Get offset based on timerame_secs
+    new_timestamp = ccxt.Exchange.round_timeframe(timeframe, date.timestamp() * 1000,
-    offset = date.timestamp() % timeframe_secs
+                                                  ROUND_DOWN) // 1000
-    # Subtract seconds passed since last offset
-    new_timestamp = date.timestamp() - offset
     return datetime.fromtimestamp(new_timestamp, tz=timezone.utc)
 
 
@@ -839,9 +822,8 @@ def timeframe_to_next_date(timeframe: str, date: datetime = None) -> datetime:
     :param date: date to use. Defaults to utcnow()
     :returns: date of next candle (with utc timezone)
     """
-    prevdate = timeframe_to_prev_date(timeframe, date)
+    if not date:
-    timeframe_secs = timeframe_to_seconds(timeframe)
+        date = datetime.now(timezone.utc)
-
+    new_timestamp = ccxt.Exchange.round_timeframe(timeframe, date.timestamp() * 1000,
-    # Add one interval to previous candle
+                                                  ROUND_UP) // 1000
-    new_timestamp = prevdate.timestamp() + timeframe_secs
     return datetime.fromtimestamp(new_timestamp, tz=timezone.utc)

freqtrade/freqtradebot.py

@@ -216,7 +216,7 @@ class FreqtradeBot(object):
         if stake_amount == constants.UNLIMITED_STAKE_AMOUNT:
             open_trades = len(Trade.get_open_trades())
             if open_trades >= self.config['max_open_trades']:
-                logger.warning('Can\'t open a new trade: max number of trades is reached')
+                logger.warning("Can't open a new trade: max number of trades is reached")
                 return None
             return available_amount / (self.config['max_open_trades'] - open_trades)
 
@@ -351,8 +351,8 @@ class FreqtradeBot(object):
         min_stake_amount = self._get_min_pair_stake_amount(pair_s, buy_limit_requested)
         if min_stake_amount is not None and min_stake_amount > stake_amount:
             logger.warning(
-                f'Can\'t open a new trade for {pair_s}: stake amount '
+                f"Can't open a new trade for {pair_s}: stake amount "
-                f'is too small ({stake_amount} < {min_stake_amount})'
+                f"is too small ({stake_amount} < {min_stake_amount})"
             )
             return False
 
@@ -662,6 +662,7 @@ class FreqtradeBot(object):
                 return False
 
             except DependencyException as exception:
+                trade.stoploss_order_id = None
                 logger.warning('Unable to place a stoploss order on exchange: %s', exception)
 
         # If stoploss order is canceled for some reason we add it
@@ -674,6 +675,7 @@ class FreqtradeBot(object):
                 trade.stoploss_order_id = str(stoploss_order_id)
                 return False
             except DependencyException as exception:
+                trade.stoploss_order_id = None
                 logger.warning('Stoploss order was cancelled, '
                                'but unable to recreate one: %s', exception)
 
@@ -726,7 +728,8 @@ class FreqtradeBot(object):
                     )['id']
                     trade.stoploss_order_id = str(stoploss_order_id)
                 except DependencyException:
-                    logger.exception(f"Could create trailing stoploss order "
+                    trade.stoploss_order_id = None
+                    logger.exception(f"Could not create trailing stoploss order "
                                      f"for pair {trade.pair}.")
 
     def _check_and_execute_sell(self, trade: Trade, sell_rate: float,

freqtrade/optimize/backtesting.py

@@ -81,6 +81,12 @@ class Backtesting(object):
             # No strategy list specified, only one strategy
             self.strategylist.append(StrategyResolver(self.config).strategy)
 
+        if "ticker_interval" not in self.config:
+            raise OperationalException("Ticker-interval needs to be set in either configuration "
+                                       "or as cli argument `--ticker-interval 5m`")
+        self.ticker_interval = str(self.config.get('ticker_interval'))
+        self.ticker_interval_mins = timeframe_to_minutes(self.ticker_interval)
+
         # Load one (first) strategy
         self._set_strategy(self.strategylist[0])
 
@@ -89,12 +95,6 @@ class Backtesting(object):
         Load strategy into backtesting
         """
         self.strategy = strategy
-        if "ticker_interval" not in self.config:
-            raise OperationalException("Ticker-interval needs to be set in either configuration "
-                                       "or as cli argument `--ticker-interval 5m`")
-
-        self.ticker_interval = self.config.get('ticker_interval')
-        self.ticker_interval_mins = timeframe_to_minutes(self.ticker_interval)
         self.advise_buy = strategy.advise_buy
         self.advise_sell = strategy.advise_sell
         # Set stoploss_on_exchange to false for backtesting,

freqtrade/optimize/hyperopt.py

@@ -37,7 +37,7 @@ INITIAL_POINTS = 30
 MAX_LOSS = 100000  # just a big enough number to be bad result in loss optimization
 
 
-class Hyperopt(Backtesting):
+class Hyperopt:
     """
     Hyperopt class, this class contains all the logic to run a hyperopt simulation
 
@@ -46,7 +46,9 @@ class Hyperopt(Backtesting):
     hyperopt.start()
     """
     def __init__(self, config: Dict[str, Any]) -> None:
-        super().__init__(config)
+        self.config = config
+        self.backtesting = Backtesting(self.config)
+
         self.custom_hyperopt = HyperOptResolver(self.config).hyperopt
 
         self.custom_hyperoptloss = HyperOptLossResolver(self.config).hyperoptloss
@@ -70,10 +72,10 @@ class Hyperopt(Backtesting):
 
         # Populate functions here (hasattr is slow so should not be run during "regular" operations)
         if hasattr(self.custom_hyperopt, 'populate_buy_trend'):
-            self.advise_buy = self.custom_hyperopt.populate_buy_trend  # type: ignore
+            self.backtesting.advise_buy = self.custom_hyperopt.populate_buy_trend  # type: ignore
 
         if hasattr(self.custom_hyperopt, 'populate_sell_trend'):
-            self.advise_sell = self.custom_hyperopt.populate_sell_trend  # type: ignore
+            self.backtesting.advise_sell = self.custom_hyperopt.populate_sell_trend  # type: ignore
 
         # Use max_open_trades for hyperopt as well, except --disable-max-market-positions is set
         if self.config.get('use_max_market_positions', True):
@@ -122,14 +124,14 @@ class Hyperopt(Backtesting):
         Save hyperopt trials to file
         """
         if self.trials:
-            logger.info('Saving %d evaluations to \'%s\'', len(self.trials), self.trials_file)
+            logger.info("Saving %d evaluations to '%s'", len(self.trials), self.trials_file)
             dump(self.trials, self.trials_file)
 
     def read_trials(self) -> List:
         """
         Read hyperopt trials file
         """
-        logger.info('Reading Trials from \'%s\'', self.trials_file)
+        logger.info("Reading Trials from '%s'", self.trials_file)
         trials = load(self.trials_file)
         self.trials_file.unlink()
         return trials
@@ -249,22 +251,22 @@ class Hyperopt(Backtesting):
         """
         params = self.get_args(_params)
         if self.has_space('roi'):
-            self.strategy.minimal_roi = self.custom_hyperopt.generate_roi_table(params)
+            self.backtesting.strategy.minimal_roi = self.custom_hyperopt.generate_roi_table(params)
 
         if self.has_space('buy'):
-            self.advise_buy = self.custom_hyperopt.buy_strategy_generator(params)
+            self.backtesting.advise_buy = self.custom_hyperopt.buy_strategy_generator(params)
 
         if self.has_space('sell'):
-            self.advise_sell = self.custom_hyperopt.sell_strategy_generator(params)
+            self.backtesting.advise_sell = self.custom_hyperopt.sell_strategy_generator(params)
 
         if self.has_space('stoploss'):
-            self.strategy.stoploss = params['stoploss']
+            self.backtesting.strategy.stoploss = params['stoploss']
 
         processed = load(self.tickerdata_pickle)
 
         min_date, max_date = get_timeframe(processed)
 
-        results = self.backtest(
+        results = self.backtesting.backtest(
             {
                 'stake_amount': self.config['stake_amount'],
                 'processed': processed,
@@ -345,9 +347,9 @@ class Hyperopt(Backtesting):
         data = load_data(
             datadir=Path(self.config['datadir']) if self.config.get('datadir') else None,
             pairs=self.config['exchange']['pair_whitelist'],
-            ticker_interval=self.ticker_interval,
+            ticker_interval=self.backtesting.ticker_interval,
             refresh_pairs=self.config.get('refresh_pairs', False),
-            exchange=self.exchange,
+            exchange=self.backtesting.exchange,
             timerange=timerange
         )
 
@@ -364,20 +366,20 @@ class Hyperopt(Backtesting):
             (max_date - min_date).days
         )
 
-        self.strategy.advise_indicators = \
+        self.backtesting.strategy.advise_indicators = \
             self.custom_hyperopt.populate_indicators  # type: ignore
 
-        preprocessed = self.strategy.tickerdata_to_dataframe(data)
+        preprocessed = self.backtesting.strategy.tickerdata_to_dataframe(data)
 
         dump(preprocessed, self.tickerdata_pickle)
 
         # We don't need exchange instance anymore while running hyperopt
-        self.exchange = None  # type: ignore
+        self.backtesting.exchange = None  # type: ignore
 
         self.load_previous_results()
 
         cpus = cpu_count()
-        logger.info(f'Found {cpus} CPU cores. Let\'s make them scream!')
+        logger.info(f"Found {cpus} CPU cores. Let's make them scream!")
         config_jobs = self.config.get('hyperopt_jobs', -1)
         logger.info(f'Number of parallel jobs set as: {config_jobs}')
 

freqtrade/persistence.py

@@ -48,8 +48,8 @@ def init(db_url: str, clean_open_orders: bool = False) -> None:
     try:
         engine = create_engine(db_url, **kwargs)
     except NoSuchModuleError:
-        raise OperationalException(f'Given value for db_url: \'{db_url}\' '
+        raise OperationalException(f"Given value for db_url: '{db_url}' "
-                                   f'is no valid database URL! (See {_SQL_DOCS_URL})')
+                                   f"is no valid database URL! (See {_SQL_DOCS_URL})")
 
     session = scoped_session(sessionmaker(bind=engine, autoflush=True, autocommit=True))
     Trade.session = session()

freqtrade/resolvers/strategy_resolver.py

@@ -153,6 +153,10 @@ class StrategyResolver(IResolver):
             strategy._populate_fun_len = len(getfullargspec(strategy.populate_indicators).args)
             strategy._buy_fun_len = len(getfullargspec(strategy.populate_buy_trend).args)
             strategy._sell_fun_len = len(getfullargspec(strategy.populate_sell_trend).args)
+            if any([x == 2 for x in [strategy._populate_fun_len,
+                                     strategy._buy_fun_len,
+                                     strategy._sell_fun_len]]):
+                strategy.INTERFACE_VERSION = 1
 
             try:
                 return import_strategy(strategy, config=config)

freqtrade/rpc/rpc_manager.py

@@ -56,7 +56,10 @@ class RPCManager(object):
         logger.info('Sending rpc message: %s', msg)
         for mod in self.registered_modules:
             logger.debug('Forwarding message to rpc.%s', mod.name)
-            mod.send_msg(msg)
+            try:
+                mod.send_msg(msg)
+            except NotImplementedError:
+                logger.error(f"Message type {msg['type']} not implemented by handler {mod.name}.")
 
     def startup_messages(self, config, pairlist) -> None:
         if config.get('dry_run', False):

freqtrade/rpc/webhook.py

@@ -43,7 +43,9 @@ class Webhook(RPC):
                 valuedict = self._config['webhook'].get('webhookbuy', None)
             elif msg['type'] == RPCMessageType.SELL_NOTIFICATION:
                 valuedict = self._config['webhook'].get('webhooksell', None)
-            elif msg['type'] == RPCMessageType.STATUS_NOTIFICATION:
+            elif msg['type'] in(RPCMessageType.STATUS_NOTIFICATION,
+                                RPCMessageType.CUSTOM_NOTIFICATION,
+                                RPCMessageType.WARNING_NOTIFICATION):
                 valuedict = self._config['webhook'].get('webhookstatus', None)
             else:
                 raise NotImplementedError('Unknown message type: {}'.format(msg['type']))

freqtrade/strategy/default_strategy.py

@@ -13,6 +13,7 @@ class DefaultStrategy(IStrategy):
     Default Strategy provided by freqtrade bot.
     You can override it with your own strategy
     """
+    INTERFACE_VERSION = 2
 
     # Minimal ROI designed for the strategy
     minimal_roi = {

freqtrade/strategy/interface.py

@@ -60,6 +60,11 @@ class IStrategy(ABC):
         stoploss -> float: optimal stoploss designed for the strategy
         ticker_interval -> str: value of the ticker interval to use for the strategy
     """
+    # Strategy interface version
+    # Default to version 2
+    # Version 1 is the initial interface without metadata dict
+    # Version 2 populate_* include metadata dict
+    INTERFACE_VERSION: int = 2
 
     _populate_fun_len: int = 0
     _buy_fun_len: int = 0

freqtrade/tests/data/test_history.py

@@ -5,7 +5,7 @@ import os
 import uuid
 from pathlib import Path
 from shutil import copyfile
-from unittest.mock import MagicMock
+from unittest.mock import MagicMock, PropertyMock
 
 import arrow
 import pytest
@@ -17,6 +17,7 @@ from freqtrade.data import history
 from freqtrade.data.history import (download_pair_history,
                                     load_cached_data_for_updating,
                                     load_tickerdata_file, make_testdata_path,
+                                    refresh_backtest_ohlcv_data,
                                     trim_tickerlist)
 from freqtrade.exchange import timeframe_to_minutes
 from freqtrade.misc import file_dump_json
@@ -558,3 +559,43 @@ def test_validate_backtest_data(default_conf, mocker, caplog) -> None:
     assert not history.validate_backtest_data(data['UNITTEST/BTC'], 'UNITTEST/BTC',
                                               min_date, max_date, timeframe_to_minutes('5m'))
     assert len(caplog.record_tuples) == 0
+
+
+def test_refresh_backtest_ohlcv_data(mocker, default_conf, markets, caplog):
+    dl_mock = mocker.patch('freqtrade.data.history.download_pair_history', MagicMock())
+    mocker.patch(
+        'freqtrade.exchange.Exchange.markets', PropertyMock(return_value=markets)
+    )
+    mocker.patch.object(Path, "exists", MagicMock(return_value=True))
+    mocker.patch.object(Path, "unlink", MagicMock())
+
+    ex = get_patched_exchange(mocker, default_conf)
+    timerange = TimeRange.parse_timerange("20190101-20190102")
+    refresh_backtest_ohlcv_data(exchange=ex, pairs=["ETH/BTC", "XRP/BTC"],
+                                timeframes=["1m", "5m"], dl_path=make_testdata_path(None),
+                                timerange=timerange, erase=True
+                                )
+
+    assert dl_mock.call_count == 4
+    assert dl_mock.call_args[1]['timerange'].starttype == 'date'
+
+    assert log_has("Downloading pair ETH/BTC, interval 1m.", caplog)
+
+
+def test_download_data_no_markets(mocker, default_conf, caplog):
+    dl_mock = mocker.patch('freqtrade.data.history.download_pair_history', MagicMock())
+    mocker.patch(
+        'freqtrade.exchange.Exchange.markets', PropertyMock(return_value={})
+    )
+    ex = get_patched_exchange(mocker, default_conf)
+    timerange = TimeRange.parse_timerange("20190101-20190102")
+    unav_pairs = refresh_backtest_ohlcv_data(exchange=ex, pairs=["ETH/BTC", "XRP/BTC"],
+                                             timeframes=["1m", "5m"],
+                                             dl_path=make_testdata_path(None),
+                                             timerange=timerange, erase=False
+                                             )
+
+    assert dl_mock.call_count == 0
+    assert "ETH/BTC" in unav_pairs
+    assert "XRP/BTC" in unav_pairs
+    assert log_has("Skipping pair ETH/BTC...", caplog)

freqtrade/tests/exchange/test_binance.py

@@ -0,0 +1,90 @@
+from random import randint
+from unittest.mock import MagicMock
+
+import ccxt
+import pytest
+
+from freqtrade import DependencyException, OperationalException, TemporaryError
+from freqtrade.tests.conftest import get_patched_exchange
+
+
+def test_stoploss_limit_order(default_conf, mocker):
+    api_mock = MagicMock()
+    order_id = 'test_prod_buy_{}'.format(randint(0, 10 ** 6))
+    order_type = 'stop_loss_limit'
+
+    api_mock.create_order = MagicMock(return_value={
+        'id': order_id,
+        'info': {
+            'foo': 'bar'
+        }
+    })
+
+    default_conf['dry_run'] = False
+    mocker.patch('freqtrade.exchange.Exchange.symbol_amount_prec', lambda s, x, y: y)
+    mocker.patch('freqtrade.exchange.Exchange.symbol_price_prec', lambda s, x, y: y)
+
+    exchange = get_patched_exchange(mocker, default_conf, api_mock, 'binance')
+
+    with pytest.raises(OperationalException):
+        order = exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=190, rate=200)
+
+    api_mock.create_order.reset_mock()
+
+    order = exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
+
+    assert 'id' in order
+    assert 'info' in order
+    assert order['id'] == order_id
+    assert api_mock.create_order.call_args[0][0] == 'ETH/BTC'
+    assert api_mock.create_order.call_args[0][1] == order_type
+    assert api_mock.create_order.call_args[0][2] == 'sell'
+    assert api_mock.create_order.call_args[0][3] == 1
+    assert api_mock.create_order.call_args[0][4] == 200
+    assert api_mock.create_order.call_args[0][5] == {'stopPrice': 220}
+
+    # test exception handling
+    with pytest.raises(DependencyException):
+        api_mock.create_order = MagicMock(side_effect=ccxt.InsufficientFunds("0 balance"))
+        exchange = get_patched_exchange(mocker, default_conf, api_mock, 'binance')
+        exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
+
+    with pytest.raises(DependencyException):
+        api_mock.create_order = MagicMock(side_effect=ccxt.InvalidOrder("Order not found"))
+        exchange = get_patched_exchange(mocker, default_conf, api_mock, 'binance')
+        exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
+
+    with pytest.raises(TemporaryError):
+        api_mock.create_order = MagicMock(side_effect=ccxt.NetworkError("No connection"))
+        exchange = get_patched_exchange(mocker, default_conf, api_mock, 'binance')
+        exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
+
+    with pytest.raises(OperationalException, match=r".*DeadBeef.*"):
+        api_mock.create_order = MagicMock(side_effect=ccxt.BaseError("DeadBeef"))
+        exchange = get_patched_exchange(mocker, default_conf, api_mock, 'binance')
+        exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
+
+
+def test_stoploss_limit_order_dry_run(default_conf, mocker):
+    api_mock = MagicMock()
+    order_type = 'stop_loss_limit'
+    default_conf['dry_run'] = True
+    mocker.patch('freqtrade.exchange.Exchange.symbol_amount_prec', lambda s, x, y: y)
+    mocker.patch('freqtrade.exchange.Exchange.symbol_price_prec', lambda s, x, y: y)
+
+    exchange = get_patched_exchange(mocker, default_conf, api_mock, 'binance')
+
+    with pytest.raises(OperationalException):
+        order = exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=190, rate=200)
+
+    api_mock.create_order.reset_mock()
+
+    order = exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
+
+    assert 'id' in order
+    assert 'info' in order
+    assert 'type' in order
+
+    assert order['type'] == order_type
+    assert order['price'] == 220
+    assert order['amount'] == 1

freqtrade/tests/exchange/test_exchange.py

@@ -101,18 +101,21 @@ def test_destroy(default_conf, mocker, caplog):
 def test_init_exception(default_conf, mocker):
     default_conf['exchange']['name'] = 'wrong_exchange_name'
 
-    with pytest.raises(
+    with pytest.raises(OperationalException,
-            OperationalException,
+                       match=f"Exchange {default_conf['exchange']['name']} is not supported"):
-            match='Exchange {} is not supported'.format(default_conf['exchange']['name'])):
         Exchange(default_conf)
 
     default_conf['exchange']['name'] = 'binance'
-    with pytest.raises(
+    with pytest.raises(OperationalException,
-            OperationalException,
+                       match=f"Exchange {default_conf['exchange']['name']} is not supported"):
-            match='Exchange {} is not supported'.format(default_conf['exchange']['name'])):
         mocker.patch("ccxt.binance", MagicMock(side_effect=AttributeError))
         Exchange(default_conf)
 
+    with pytest.raises(OperationalException,
+                       match=r"Initialization of ccxt failed. Reason: DeadBeef"):
+        mocker.patch("ccxt.binance", MagicMock(side_effect=ccxt.BaseError("DeadBeef")))
+        Exchange(default_conf)
+
 
 def test_exchange_resolver(default_conf, mocker, caplog):
     mocker.patch('freqtrade.exchange.Exchange._init_ccxt', MagicMock(return_value=MagicMock()))
@@ -1436,87 +1439,11 @@ def test_get_fee(default_conf, mocker, exchange_name):
                            'get_fee', 'calculate_fee')
 
 
-def test_stoploss_limit_order(default_conf, mocker):
+def test_stoploss_limit_order_unsupported_exchange(default_conf, mocker):
-    api_mock = MagicMock()
+    exchange = get_patched_exchange(mocker, default_conf, 'bittrex')
-    order_id = 'test_prod_buy_{}'.format(randint(0, 10 ** 6))
+    with pytest.raises(OperationalException, match=r"stoploss_limit is not implemented .*"):
-    order_type = 'stop_loss_limit'
-
-    api_mock.create_order = MagicMock(return_value={
-        'id': order_id,
-        'info': {
-            'foo': 'bar'
-        }
-    })
-
-    default_conf['dry_run'] = False
-    mocker.patch('freqtrade.exchange.Exchange.symbol_amount_prec', lambda s, x, y: y)
-    mocker.patch('freqtrade.exchange.Exchange.symbol_price_prec', lambda s, x, y: y)
-
-    exchange = get_patched_exchange(mocker, default_conf, api_mock, 'binance')
-
-    with pytest.raises(OperationalException):
-        order = exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=190, rate=200)
-
-    api_mock.create_order.reset_mock()
-
-    order = exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
-
-    assert 'id' in order
-    assert 'info' in order
-    assert order['id'] == order_id
-    assert api_mock.create_order.call_args[0][0] == 'ETH/BTC'
-    assert api_mock.create_order.call_args[0][1] == order_type
-    assert api_mock.create_order.call_args[0][2] == 'sell'
-    assert api_mock.create_order.call_args[0][3] == 1
-    assert api_mock.create_order.call_args[0][4] == 200
-    assert api_mock.create_order.call_args[0][5] == {'stopPrice': 220}
-
-    # test exception handling
-    with pytest.raises(DependencyException):
-        api_mock.create_order = MagicMock(side_effect=ccxt.InsufficientFunds("0 balance"))
-        exchange = get_patched_exchange(mocker, default_conf, api_mock)
         exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
 
-    with pytest.raises(DependencyException):
-        api_mock.create_order = MagicMock(side_effect=ccxt.InvalidOrder("Order not found"))
-        exchange = get_patched_exchange(mocker, default_conf, api_mock)
-        exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
-
-    with pytest.raises(TemporaryError):
-        api_mock.create_order = MagicMock(side_effect=ccxt.NetworkError("No connection"))
-        exchange = get_patched_exchange(mocker, default_conf, api_mock)
-        exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
-
-    with pytest.raises(OperationalException):
-        api_mock.create_order = MagicMock(side_effect=ccxt.BaseError("DeadBeef"))
-        exchange = get_patched_exchange(mocker, default_conf, api_mock)
-        exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
-
-
-def test_stoploss_limit_order_dry_run(default_conf, mocker):
-    api_mock = MagicMock()
-    order_type = 'stop_loss_limit'
-    default_conf['dry_run'] = True
-    mocker.patch('freqtrade.exchange.Exchange.symbol_amount_prec', lambda s, x, y: y)
-    mocker.patch('freqtrade.exchange.Exchange.symbol_price_prec', lambda s, x, y: y)
-
-    exchange = get_patched_exchange(mocker, default_conf, api_mock, 'binance')
-
-    with pytest.raises(OperationalException):
-        order = exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=190, rate=200)
-
-    api_mock.create_order.reset_mock()
-
-    order = exchange.stoploss_limit(pair='ETH/BTC', amount=1, stop_price=220, rate=200)
-
-    assert 'id' in order
-    assert 'info' in order
-    assert 'type' in order
-
-    assert order['type'] == order_type
-    assert order['price'] == 220
-    assert order['amount'] == 1
-
 
 def test_merge_ft_has_dict(default_conf, mocker):
     mocker.patch.multiple('freqtrade.exchange.Exchange',
@@ -1604,7 +1531,7 @@ def test_timeframe_to_prev_date():
         assert timeframe_to_prev_date(interval, date) == result
 
     date = datetime.now(tz=timezone.utc)
-    assert timeframe_to_prev_date("5m", date) < date
+    assert timeframe_to_prev_date("5m") < date
 
 
 def test_timeframe_to_next_date():
@@ -1629,4 +1556,4 @@ def test_timeframe_to_next_date():
         assert timeframe_to_next_date(interval, date) == result
 
     date = datetime.now(tz=timezone.utc)
-    assert timeframe_to_next_date("5m", date) > date
+    assert timeframe_to_next_date("5m") > date

freqtrade/tests/optimize/test_backtesting.py

@@ -330,7 +330,7 @@ def test_backtesting_init_no_ticker_interval(mocker, default_conf, caplog) -> No
     patch_exchange(mocker)
     del default_conf['ticker_interval']
     default_conf['strategy_list'] = ['DefaultStrategy',
-                                     'TestStrategy']
+                                     'SampleStrategy']
 
     mocker.patch('freqtrade.exchange.Exchange.get_fee', MagicMock(return_value=0.5))
     with pytest.raises(OperationalException):
@@ -877,7 +877,7 @@ def test_backtest_start_multi_strat(default_conf, mocker, caplog):
         '--disable-max-market-positions',
         '--strategy-list',
         'DefaultStrategy',
-        'TestStrategy',
+        'SampleStrategy',
     ]
     args = get_args(args)
     start_backtesting(args)
@@ -898,7 +898,7 @@ def test_backtest_start_multi_strat(default_conf, mocker, caplog):
         'up to 2017-11-14T22:58:00+00:00 (0 days)..',
         'Parameter --enable-position-stacking detected ...',
         'Running backtesting for Strategy DefaultStrategy',
-        'Running backtesting for Strategy TestStrategy',
+        'Running backtesting for Strategy SampleStrategy',
     ]
 
     for line in exists:

freqtrade/tests/optimize/test_hyperopt.py

@@ -254,7 +254,7 @@ def test_start_failure(mocker, default_conf, caplog) -> None:
 
     args = [
         '--config', 'config.json',
-        '--strategy', 'TestStrategy',
+        '--strategy', 'SampleStrategy',
         'hyperopt',
         '--epochs', '5'
     ]
@@ -381,7 +381,7 @@ def test_save_trials_saves_trials(mocker, hyperopt, caplog) -> None:
     hyperopt.save_trials()
 
     trials_file = os.path.join('freqtrade', 'tests', 'optimize', 'ut_trials.pickle')
-    assert log_has('Saving 1 evaluations to \'{}\''.format(trials_file), caplog)
+    assert log_has("Saving 1 evaluations to '{}'".format(trials_file), caplog)
     mock_dump.assert_called_once()
 
 
@@ -390,7 +390,7 @@ def test_read_trials_returns_trials_file(mocker, hyperopt, caplog) -> None:
     mock_load = mocker.patch('freqtrade.optimize.hyperopt.load', return_value=trials)
     hyperopt_trial = hyperopt.read_trials()
     trials_file = os.path.join('freqtrade', 'tests', 'optimize', 'ut_trials.pickle')
-    assert log_has('Reading Trials from \'{}\''.format(trials_file), caplog)
+    assert log_has("Reading Trials from '{}'".format(trials_file), caplog)
     assert hyperopt_trial == trials
     mock_load.assert_called_once()
 
@@ -429,7 +429,7 @@ def test_start_calls_optimizer(mocker, default_conf, caplog, capsys) -> None:
                          'hyperopt_jobs': 1, })
 
     hyperopt = Hyperopt(default_conf)
-    hyperopt.strategy.tickerdata_to_dataframe = MagicMock()
+    hyperopt.backtesting.strategy.tickerdata_to_dataframe = MagicMock()
     hyperopt.custom_hyperopt.generate_roi_table = MagicMock(return_value={})
 
     hyperopt.start()
@@ -441,8 +441,8 @@ def test_start_calls_optimizer(mocker, default_conf, caplog, capsys) -> None:
     assert dumper.called
     # Should be called twice, once for tickerdata, once to save evaluations
     assert dumper.call_count == 2
-    assert hasattr(hyperopt, "advise_sell")
+    assert hasattr(hyperopt.backtesting, "advise_sell")
-    assert hasattr(hyperopt, "advise_buy")
+    assert hasattr(hyperopt.backtesting, "advise_buy")
     assert hasattr(hyperopt, "max_open_trades")
     assert hyperopt.max_open_trades == default_conf['max_open_trades']
     assert hasattr(hyperopt, "position_stacking")
@@ -488,7 +488,7 @@ def test_populate_indicators(hyperopt) -> None:
     tick = load_tickerdata_file(None, 'UNITTEST/BTC', '1m')
     tickerlist = {'UNITTEST/BTC': parse_ticker_dataframe(tick, '1m', pair="UNITTEST/BTC",
                                                          fill_missing=True)}
-    dataframes = hyperopt.strategy.tickerdata_to_dataframe(tickerlist)
+    dataframes = hyperopt.backtesting.strategy.tickerdata_to_dataframe(tickerlist)
     dataframe = hyperopt.custom_hyperopt.populate_indicators(dataframes['UNITTEST/BTC'],
                                                              {'pair': 'UNITTEST/BTC'})
 
@@ -502,7 +502,7 @@ def test_buy_strategy_generator(hyperopt) -> None:
     tick = load_tickerdata_file(None, 'UNITTEST/BTC', '1m')
     tickerlist = {'UNITTEST/BTC': parse_ticker_dataframe(tick, '1m', pair="UNITTEST/BTC",
                                                          fill_missing=True)}
-    dataframes = hyperopt.strategy.tickerdata_to_dataframe(tickerlist)
+    dataframes = hyperopt.backtesting.strategy.tickerdata_to_dataframe(tickerlist)
     dataframe = hyperopt.custom_hyperopt.populate_indicators(dataframes['UNITTEST/BTC'],
                                                              {'pair': 'UNITTEST/BTC'})
 
@@ -538,7 +538,7 @@ def test_generate_optimizer(mocker, default_conf) -> None:
     backtest_result = pd.DataFrame.from_records(trades, columns=labels)
 
     mocker.patch(
-        'freqtrade.optimize.hyperopt.Hyperopt.backtest',
+        'freqtrade.optimize.hyperopt.Backtesting.backtest',
         MagicMock(return_value=backtest_result)
     )
     mocker.patch(
@@ -644,7 +644,7 @@ def test_print_json_spaces_all(mocker, default_conf, caplog, capsys) -> None:
                          })
 
     hyperopt = Hyperopt(default_conf)
-    hyperopt.strategy.tickerdata_to_dataframe = MagicMock()
+    hyperopt.backtesting.strategy.tickerdata_to_dataframe = MagicMock()
     hyperopt.custom_hyperopt.generate_roi_table = MagicMock(return_value={})
 
     hyperopt.start()
@@ -681,7 +681,7 @@ def test_print_json_spaces_roi_stoploss(mocker, default_conf, caplog, capsys) ->
                          })
 
     hyperopt = Hyperopt(default_conf)
-    hyperopt.strategy.tickerdata_to_dataframe = MagicMock()
+    hyperopt.backtesting.strategy.tickerdata_to_dataframe = MagicMock()
     hyperopt.custom_hyperopt.generate_roi_table = MagicMock(return_value={})
 
     hyperopt.start()

freqtrade/tests/rpc/test_rpc_manager.py

@@ -115,6 +115,22 @@ def test_init_webhook_enabled(mocker, default_conf, caplog) -> None:
     assert 'webhook' in [mod.name for mod in rpc_manager.registered_modules]
 
 
+def test_send_msg_webhook_CustomMessagetype(mocker, default_conf, caplog) -> None:
+    caplog.set_level(logging.DEBUG)
+    default_conf['telegram']['enabled'] = False
+    default_conf['webhook'] = {'enabled': True, 'url': "https://DEADBEEF.com"}
+    mocker.patch('freqtrade.rpc.webhook.Webhook.send_msg',
+                 MagicMock(side_effect=NotImplementedError))
+    rpc_manager = RPCManager(get_patched_freqtradebot(mocker, default_conf))
+
+    assert 'webhook' in [mod.name for mod in rpc_manager.registered_modules]
+    rpc_manager.send_msg({'type': RPCMessageType.CUSTOM_NOTIFICATION,
+                          'status': 'TestMessage'})
+    assert log_has(
+        "Message type RPCMessageType.CUSTOM_NOTIFICATION not implemented by handler webhook.",
+        caplog)
+
+
 def test_startupmessages_telegram_enabled(mocker, default_conf, caplog) -> None:
     telegram_mock = mocker.patch('freqtrade.rpc.telegram.Telegram.send_msg', MagicMock())
     mocker.patch('freqtrade.rpc.telegram.Telegram._init', MagicMock())

freqtrade/tests/rpc/test_rpc_webhook.py

@@ -91,21 +91,24 @@ def test_send_msg(default_conf, mocker):
     assert (msg_mock.call_args[0][0]["value3"] ==
             default_conf["webhook"]["webhooksell"]["value3"].format(**msg))
 
-    # Test notification
+    for msgtype in [RPCMessageType.STATUS_NOTIFICATION,
-    msg = {
+                    RPCMessageType.WARNING_NOTIFICATION,
-        'type': RPCMessageType.STATUS_NOTIFICATION,
+                    RPCMessageType.CUSTOM_NOTIFICATION]:
-        'status': 'Unfilled sell order for BTC cancelled due to timeout'
+        # Test notification
-    }
+        msg = {
-    msg_mock = MagicMock()
+            'type': msgtype,
-    mocker.patch("freqtrade.rpc.webhook.Webhook._send_msg", msg_mock)
+            'status': 'Unfilled sell order for BTC cancelled due to timeout'
-    webhook.send_msg(msg)
+        }
-    assert msg_mock.call_count == 1
+        msg_mock = MagicMock()
-    assert (msg_mock.call_args[0][0]["value1"] ==
+        mocker.patch("freqtrade.rpc.webhook.Webhook._send_msg", msg_mock)
-            default_conf["webhook"]["webhookstatus"]["value1"].format(**msg))
+        webhook.send_msg(msg)
-    assert (msg_mock.call_args[0][0]["value2"] ==
+        assert msg_mock.call_count == 1
-            default_conf["webhook"]["webhookstatus"]["value2"].format(**msg))
+        assert (msg_mock.call_args[0][0]["value1"] ==
-    assert (msg_mock.call_args[0][0]["value3"] ==
+                default_conf["webhook"]["webhookstatus"]["value1"].format(**msg))
-            default_conf["webhook"]["webhookstatus"]["value3"].format(**msg))
+        assert (msg_mock.call_args[0][0]["value2"] ==
+                default_conf["webhook"]["webhookstatus"]["value2"].format(**msg))
+        assert (msg_mock.call_args[0][0]["value3"] ==
+                default_conf["webhook"]["webhookstatus"]["value3"].format(**msg))
 
 
 def test_exception_send_msg(default_conf, mocker, caplog):

freqtrade/tests/strategy/legacy_strategy.py

@@ -15,7 +15,7 @@ class TestStrategyLegacy(IStrategy):
     """
     This is a test strategy using the legacy function headers, which will be
     removed in a future update.
-    Please do not use this as a template, but refer to user_data/strategy/TestStrategy.py
+    Please do not use this as a template, but refer to user_data/strategy/sample_strategy.py
     for a uptodate version of this template.
 
     """

freqtrade/tests/strategy/test_strategy.py

@@ -61,27 +61,27 @@ def test_search_strategy():
 
 
 def test_load_strategy(default_conf, result):
-    default_conf.update({'strategy': 'TestStrategy'})
+    default_conf.update({'strategy': 'SampleStrategy'})
     resolver = StrategyResolver(default_conf)
     assert 'adx' in resolver.strategy.advise_indicators(result, {'pair': 'ETH/BTC'})
 
 
 def test_load_strategy_base64(result, caplog, default_conf):
-    with open("user_data/strategies/test_strategy.py", "rb") as file:
+    with open("user_data/strategies/sample_strategy.py", "rb") as file:
         encoded_string = urlsafe_b64encode(file.read()).decode("utf-8")
-    default_conf.update({'strategy': 'TestStrategy:{}'.format(encoded_string)})
+    default_conf.update({'strategy': 'SampleStrategy:{}'.format(encoded_string)})
 
     resolver = StrategyResolver(default_conf)
     assert 'adx' in resolver.strategy.advise_indicators(result, {'pair': 'ETH/BTC'})
     # Make sure strategy was loaded from base64 (using temp directory)!!
-    assert log_has_re(r"Using resolved strategy TestStrategy from '"
+    assert log_has_re(r"Using resolved strategy SampleStrategy from '"
-                      + tempfile.gettempdir() + r"/.*/TestStrategy\.py'\.\.\.", caplog)
+                      + tempfile.gettempdir() + r"/.*/SampleStrategy\.py'\.\.\.", caplog)
 
 
 def test_load_strategy_invalid_directory(result, caplog, default_conf):
     resolver = StrategyResolver(default_conf)
     extra_dir = Path.cwd() / 'some/path'
-    resolver._load_strategy('TestStrategy', config=default_conf, extra_dir=extra_dir)
+    resolver._load_strategy('SampleStrategy', config=default_conf, extra_dir=extra_dir)
 
     assert log_has_re(r'Path .*' + r'some.*path.*' + r'.* does not exist', caplog)
 
@@ -380,6 +380,31 @@ def test_call_deprecated_function(result, monkeypatch, default_conf):
     assert resolver.strategy._populate_fun_len == 2
     assert resolver.strategy._buy_fun_len == 2
     assert resolver.strategy._sell_fun_len == 2
+    assert resolver.strategy.INTERFACE_VERSION == 1
+
+    indicator_df = resolver.strategy.advise_indicators(result, metadata=metadata)
+    assert isinstance(indicator_df, DataFrame)
+    assert 'adx' in indicator_df.columns
+
+    buydf = resolver.strategy.advise_buy(result, metadata=metadata)
+    assert isinstance(buydf, DataFrame)
+    assert 'buy' in buydf.columns
+
+    selldf = resolver.strategy.advise_sell(result, metadata=metadata)
+    assert isinstance(selldf, DataFrame)
+    assert 'sell' in selldf
+
+
+def test_strategy_interface_versioning(result, monkeypatch, default_conf):
+    default_conf.update({'strategy': 'DefaultStrategy'})
+    resolver = StrategyResolver(default_conf)
+    metadata = {'pair': 'ETH/BTC'}
+
+    # Make sure we are using a legacy function
+    assert resolver.strategy._populate_fun_len == 3
+    assert resolver.strategy._buy_fun_len == 3
+    assert resolver.strategy._sell_fun_len == 3
+    assert resolver.strategy.INTERFACE_VERSION == 2
 
     indicator_df = resolver.strategy.advise_indicators(result, metadata=metadata)
     assert isinstance(indicator_df, DataFrame)

freqtrade/tests/test_arguments.py

@@ -101,7 +101,7 @@ def test_parse_args_backtesting_custom() -> None:
         '--refresh-pairs-cached',
         '--strategy-list',
         'DefaultStrategy',
-        'TestStrategy'
+        'SampleStrategy'
         ]
     call_args = Arguments(args, '').get_parsed_arg()
     assert call_args.config == ['test_conf.json']

freqtrade/tests/test_configuration.py

@@ -41,14 +41,14 @@ def test_load_config_invalid_pair(default_conf) -> None:
 def test_load_config_missing_attributes(default_conf) -> None:
     default_conf.pop('exchange')
 
-    with pytest.raises(ValidationError, match=r'.*\'exchange\' is a required property.*'):
+    with pytest.raises(ValidationError, match=r".*'exchange' is a required property.*"):
         validate_config_schema(default_conf)
 
 
 def test_load_config_incorrect_stake_amount(default_conf) -> None:
     default_conf['stake_amount'] = 'fake'
 
-    with pytest.raises(ValidationError, match=r'.*\'fake\' does not match \'unlimited\'.*'):
+    with pytest.raises(ValidationError, match=r".*'fake' does not match 'unlimited'.*"):
         validate_config_schema(default_conf)
 
 
@@ -472,7 +472,7 @@ def test_hyperopt_with_arguments(mocker, default_conf, caplog) -> None:
 
     assert 'spaces' in config
     assert config['spaces'] == ['all']
-    assert log_has('Parameter -s/--spaces detected: [\'all\']', caplog)
+    assert log_has("Parameter -s/--spaces detected: ['all']", caplog)
     assert "runmode" in config
     assert config['runmode'] == RunMode.HYPEROPT
 
@@ -722,7 +722,7 @@ def test_load_config_default_exchange(all_conf) -> None:
     assert 'exchange' not in all_conf
 
     with pytest.raises(ValidationError,
-                       match=r'\'exchange\' is a required property'):
+                       match=r"'exchange' is a required property"):
         validate_config_schema(all_conf)
 
 
@@ -736,7 +736,7 @@ def test_load_config_default_exchange_name(all_conf) -> None:
     assert 'name' not in all_conf['exchange']
 
     with pytest.raises(ValidationError,
-                       match=r'\'name\' is a required property'):
+                       match=r"'name' is a required property"):
         validate_config_schema(all_conf)
 
 
@@ -871,3 +871,4 @@ def test_pairlist_resolving_fallback(mocker):
 
     assert config['pairs'] == ['ETH/BTC', 'XRP/BTC']
     assert config['exchange']['name'] == 'binance'
+    assert config['datadir'] == str(Path.cwd() / "user_data/data/binance")

freqtrade/tests/test_freqtradebot.py

@@ -1112,6 +1112,7 @@ def test_handle_stoploss_on_exchange(mocker, default_conf, fee, caplog,
 
     # Third case: when stoploss was set but it was canceled for some reason
     # should set a stoploss immediately and return False
+    caplog.clear()
     trade.is_open = True
     trade.open_order_id = None
     trade.stoploss_order_id = 100
@@ -1127,6 +1128,7 @@ def test_handle_stoploss_on_exchange(mocker, default_conf, fee, caplog,
     # Fourth case: when stoploss is set and it is hit
     # should unset stoploss_order_id and return true
     # as a trade actually happened
+    caplog.clear()
     freqtrade.create_trades()
     trade = Trade.query.first()
     trade.is_open = True
@@ -1152,6 +1154,7 @@ def test_handle_stoploss_on_exchange(mocker, default_conf, fee, caplog,
     )
     freqtrade.handle_stoploss_on_exchange(trade)
     assert log_has('Unable to place a stoploss order on exchange: ', caplog)
+    assert trade.stoploss_order_id is None
 
     # Fifth case: get_order returns InvalidOrder
     # It should try to add stoploss order
@@ -1163,6 +1166,41 @@ def test_handle_stoploss_on_exchange(mocker, default_conf, fee, caplog,
     assert stoploss_limit.call_count == 1
 
 
+def test_handle_sle_cancel_cant_recreate(mocker, default_conf, fee, caplog,
+                                         markets, limit_buy_order, limit_sell_order) -> None:
+    # Sixth case: stoploss order was cancelled but couldn't create new one
+    patch_RPCManager(mocker)
+    patch_exchange(mocker)
+    mocker.patch.multiple(
+        'freqtrade.exchange.Exchange',
+        get_ticker=MagicMock(return_value={
+            'bid': 0.00001172,
+            'ask': 0.00001173,
+            'last': 0.00001172
+        }),
+        buy=MagicMock(return_value={'id': limit_buy_order['id']}),
+        sell=MagicMock(return_value={'id': limit_sell_order['id']}),
+        get_fee=fee,
+        markets=PropertyMock(return_value=markets),
+        get_order=MagicMock(return_value={'status': 'canceled'}),
+        stoploss_limit=MagicMock(side_effect=DependencyException()),
+    )
+    freqtrade = FreqtradeBot(default_conf)
+    patch_get_signal(freqtrade)
+
+    freqtrade.create_trades()
+    trade = Trade.query.first()
+    trade.is_open = True
+    trade.open_order_id = '12345'
+    trade.stoploss_order_id = 100
+    assert trade
+
+    assert freqtrade.handle_stoploss_on_exchange(trade) is False
+    assert log_has_re(r'Stoploss order was cancelled, but unable to recreate one.*', caplog)
+    assert trade.stoploss_order_id is None
+    assert trade.is_open is True
+
+
 def test_handle_stoploss_on_exchange_trailing(mocker, default_conf, fee, caplog,
                                               markets, limit_buy_order, limit_sell_order) -> None:
     # When trailing stoploss is set
@@ -1324,7 +1362,7 @@ def test_handle_stoploss_on_exchange_trailing_error(mocker, default_conf, fee, c
     mocker.patch("freqtrade.exchange.Exchange.stoploss_limit", side_effect=DependencyException())
     freqtrade.handle_trailing_stoploss_on_exchange(trade, stoploss_order_hanging)
     assert cancel_mock.call_count == 1
-    assert log_has_re(r"Could create trailing stoploss order for pair ETH/BTC\..*", caplog)
+    assert log_has_re(r"Could not create trailing stoploss order for pair ETH/BTC\..*", caplog)
 
 
 def test_tsl_on_exchange_compatible_with_edge(mocker, edge_conf, fee, caplog,
@@ -2376,7 +2414,7 @@ def test_may_execute_sell_after_stoploss_on_exchange_hit(default_conf,
 
     mocker.patch('freqtrade.exchange.Exchange.symbol_amount_prec', lambda s, x, y: y)
     mocker.patch('freqtrade.exchange.Exchange.symbol_price_prec', lambda s, x, y: y)
-    mocker.patch('freqtrade.exchange.Exchange.stoploss_limit', stoploss_limit)
+    mocker.patch('freqtrade.exchange.Binance.stoploss_limit', stoploss_limit)
 
     freqtrade = FreqtradeBot(default_conf)
     freqtrade.strategy.order_types['stoploss_on_exchange'] = True
@@ -2416,7 +2454,6 @@ def test_may_execute_sell_after_stoploss_on_exchange_hit(default_conf,
     freqtrade.process_maybe_execute_sell(trade)
     assert trade.stoploss_order_id is None
     assert trade.is_open is False
-    print(trade.sell_reason)
     assert trade.sell_reason == SellType.STOPLOSS_ON_EXCHANGE.value
     assert rpc_mock.call_count == 2
 

freqtrade/tests/test_utils.py

@@ -1,5 +1,4 @@
 import re
-from pathlib import Path
 from unittest.mock import MagicMock, PropertyMock
 
 import pytest
@@ -70,74 +69,8 @@ def test_create_datadir(caplog, mocker):
     assert len(caplog.record_tuples) == 0
 
 
-def test_download_data(mocker, markets, caplog):
-    dl_mock = mocker.patch('freqtrade.utils.download_pair_history', MagicMock())
-    patch_exchange(mocker)
-    mocker.patch(
-        'freqtrade.exchange.Exchange.markets', PropertyMock(return_value=markets)
-    )
-    mocker.patch.object(Path, "exists", MagicMock(return_value=True))
-    mocker.patch.object(Path, "unlink", MagicMock())
-
-    args = [
-        "download-data",
-        "--exchange", "binance",
-        "--pairs", "ETH/BTC", "XRP/BTC",
-        "--erase",
-    ]
-    start_download_data(get_args(args))
-
-    assert dl_mock.call_count == 4
-    assert dl_mock.call_args[1]['timerange'].starttype is None
-    assert dl_mock.call_args[1]['timerange'].stoptype is None
-    assert log_has("Deleting existing data for pair ETH/BTC, interval 1m.", caplog)
-    assert log_has("Downloading pair ETH/BTC, interval 1m.", caplog)
-
-
-def test_download_data_days(mocker, markets, caplog):
-    dl_mock = mocker.patch('freqtrade.utils.download_pair_history', MagicMock())
-    patch_exchange(mocker)
-    mocker.patch(
-        'freqtrade.exchange.Exchange.markets', PropertyMock(return_value=markets)
-    )
-    mocker.patch.object(Path, "exists", MagicMock(return_value=True))
-    mocker.patch.object(Path, "unlink", MagicMock())
-
-    args = [
-        "download-data",
-        "--exchange", "binance",
-        "--pairs", "ETH/BTC", "XRP/BTC",
-        "--days", "20",
-    ]
-
-    start_download_data(get_args(args))
-
-    assert dl_mock.call_count == 4
-    assert dl_mock.call_args[1]['timerange'].starttype == 'date'
-
-    assert log_has("Downloading pair ETH/BTC, interval 1m.", caplog)
-
-
-def test_download_data_no_markets(mocker, caplog):
-    dl_mock = mocker.patch('freqtrade.utils.download_pair_history', MagicMock())
-    patch_exchange(mocker)
-    mocker.patch(
-        'freqtrade.exchange.Exchange.markets', PropertyMock(return_value={})
-    )
-    args = [
-        "download-data",
-        "--exchange", "binance",
-        "--pairs", "ETH/BTC", "XRP/BTC",
-    ]
-    start_download_data(get_args(args))
-
-    assert dl_mock.call_count == 0
-    assert log_has("Skipping pair ETH/BTC...", caplog)
-    assert log_has("Pairs [ETH/BTC,XRP/BTC] not available on exchange binance.", caplog)
-
-
 def test_download_data_keyboardInterrupt(mocker, caplog, markets):
-    dl_mock = mocker.patch('freqtrade.utils.download_pair_history',
+    dl_mock = mocker.patch('freqtrade.utils.refresh_backtest_ohlcv_data',
                            MagicMock(side_effect=KeyboardInterrupt))
     patch_exchange(mocker)
     mocker.patch(
@@ -152,3 +85,21 @@ def test_download_data_keyboardInterrupt(mocker, caplog, markets):
         start_download_data(get_args(args))
 
     assert dl_mock.call_count == 1
+
+
+def test_download_data_no_markets(mocker, caplog):
+    dl_mock = mocker.patch('freqtrade.utils.refresh_backtest_ohlcv_data',
+                           MagicMock(return_value=["ETH/BTC", "XRP/BTC"]))
+    patch_exchange(mocker)
+    mocker.patch(
+        'freqtrade.exchange.Exchange.markets', PropertyMock(return_value={})
+    )
+    args = [
+        "download-data",
+        "--exchange", "binance",
+        "--pairs", "ETH/BTC", "XRP/BTC",
+        "--days", "20"
+    ]
+    start_download_data(get_args(args))
+    assert dl_mock.call_args[1]['timerange'].starttype == "date"
+    assert log_has("Pairs [ETH/BTC,XRP/BTC] not available on exchange binance.", caplog)

freqtrade/utils.py

@@ -2,13 +2,13 @@ import logging
 import sys
 from argparse import Namespace
 from pathlib import Path
-from typing import Any, Dict
+from typing import Any, Dict, List
 
 import arrow
 
 from freqtrade.configuration import Configuration, TimeRange
 from freqtrade.configuration.directory_operations import create_userdata_dir
-from freqtrade.data.history import download_pair_history
+from freqtrade.data.history import refresh_backtest_ohlcv_data
 from freqtrade.exchange import available_exchanges
 from freqtrade.resolvers import ExchangeResolver
 from freqtrade.state import RunMode
@@ -75,36 +75,20 @@ def start_download_data(args: Namespace) -> None:
     logger.info(f'About to download pairs: {config["pairs"]}, '
                 f'intervals: {config["timeframes"]} to {dl_path}')
 
-    pairs_not_available = []
+    pairs_not_available: List[str] = []
 
     try:
         # Init exchange
         exchange = ExchangeResolver(config['exchange']['name'], config).exchange
 
-        for pair in config["pairs"]:
+        pairs_not_available = refresh_backtest_ohlcv_data(
-            if pair not in exchange.markets:
+            exchange, pairs=config["pairs"], timeframes=config["timeframes"],
-                pairs_not_available.append(pair)
+            dl_path=Path(config['datadir']), timerange=timerange, erase=config.get("erase"))
-                logger.info(f"Skipping pair {pair}...")
-                continue
-            for ticker_interval in config["timeframes"]:
-                pair_print = pair.replace('/', '_')
-                filename = f'{pair_print}-{ticker_interval}.json'
-                dl_file = dl_path.joinpath(filename)
-                if config.get("erase") and dl_file.exists():
-                    logger.info(
-                        f'Deleting existing data for pair {pair}, interval {ticker_interval}.')
-                    dl_file.unlink()
-
-                logger.info(f'Downloading pair {pair}, interval {ticker_interval}.')
-                download_pair_history(datadir=dl_path, exchange=exchange,
-                                      pair=pair, ticker_interval=str(ticker_interval),
-                                      timerange=timerange)
 
     except KeyboardInterrupt:
         sys.exit("SIGINT received, aborting ...")
 
     finally:
         if pairs_not_available:
-            logger.info(
+            logger.info(f"Pairs [{','.join(pairs_not_available)}] not available "
-                f"Pairs [{','.join(pairs_not_available)}] not available "
+                        f"on exchange {config['exchange']['name']}.")
-                f"on exchange {config['exchange']['name']}.")

requirements-common.txt

@@ -1,6 +1,6 @@
 # requirements without requirements installable via conda
 # mainly used for Raspberry pi installs
-ccxt==1.18.1068
+ccxt==1.18.1085
 SQLAlchemy==1.3.7
 python-telegram-bot==11.1.0
 arrow==0.14.5

requirements-dev.txt

@@ -7,7 +7,7 @@ flake8==3.7.8
 flake8-type-annotations==0.1.0
 flake8-tidy-imports==2.0.0
 mypy==0.720
-pytest==5.1.0
+pytest==5.1.1
 pytest-asyncio==0.10.0
 pytest-cov==2.7.1
 pytest-mock==1.10.4

requirements.txt

@@ -2,5 +2,5 @@
 -r requirements-common.txt
 
 numpy==1.17.0
-pandas==0.25.0
+pandas==0.25.1
 scipy==1.3.1

setup.py

@@ -45,7 +45,7 @@ setup(name='freqtrade',
       tests_require=['pytest', 'pytest-mock', 'pytest-cov'],
       install_requires=[
           # from requirements-common.txt
-          'ccxt>=1.18',
+          'ccxt>=1.18.1080',
           'SQLAlchemy',
           'python-telegram-bot',
           'arrow',
@@ -76,7 +76,7 @@ setup(name='freqtrade',
           'plot': plot,
           'all': all_extra,
           'jupyter': jupyter,
-          
+
       },
       include_package_data=True,
       zip_safe=False,

user_data/notebooks/strategy_analysis_example.ipynb

@@ -52,7 +52,7 @@
     "# Define some constants\n",
     "ticker_interval = \"5m\"\n",
     "# Name of the strategy class\n",
-    "strategy_name = 'TestStrategy'\n",
+    "strategy_name = 'SampleStrategy'\n",
     "# Path to user data\n",
     "user_data_dir = 'user_data'\n",
     "# Location of the strategy\n",

user_data/strategies/sample_strategy.py

@@ -11,10 +11,9 @@ import numpy  # noqa
 
 
 # This class is a sample. Feel free to customize it.
-class TestStrategy(IStrategy):
+class SampleStrategy(IStrategy):
-    __test__ = False  # pytest expects to find tests here because of the name
     """
-    This is a test strategy to inspire you.
+    This is a sample strategy to inspire you.
     More information in https://github.com/freqtrade/freqtrade/blob/develop/docs/bot-optimization.md
 
     You can:
@@ -28,6 +27,9 @@ class TestStrategy(IStrategy):
     - the prototype for the methods: minimal_roi, stoploss, populate_indicators, populate_buy_trend,
     populate_sell_trend, hyperopt_space, buy_strategy_generator
     """
+    # Strategy intervace version - allow new iterations of the strategy interface.
+    # Check the documentation or the Sample strategy to get the latest version.
+    INTERFACE_VERSION = 2
 
     # Minimal ROI designed for the strategy.
     # This attribute will be overridden if the config file contains "minimal_roi"
@@ -256,14 +258,14 @@ class TestStrategy(IStrategy):
         # Retrieve best bid and best ask
         # ------------------------------------
         """
-        # first check if dataprovider is available 
+        # first check if dataprovider is available
         if self.dp:
             if self.dp.runmode in ('live', 'dry_run'):
                 ob = self.dp.orderbook(metadata['pair'], 1)
                 dataframe['best_bid'] = ob['bids'][0][0]
                 dataframe['best_ask'] = ob['asks'][0][0]
         """
-        
+
         return dataframe
 
     def populate_buy_trend(self, dataframe: DataFrame, metadata: dict) -> DataFrame: