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Convert StrategyLoader to static loader

This commit is contained in:
Matthias 2019-12-23 10:23:48 +01:00
parent 6d5aca4f32
commit c6d2233978
8 changed files with 116 additions and 112 deletions
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6
docs/strategy_analysis_example.md
View File

@ -44,9 +44,9 @@ candles.head()
```python
# Load strategy using values set above
from freqtrade.resolvers import StrategyResolver
strategy = StrategyResolver({'strategy': strategy_name,
'user_data_dir': user_data_dir,
'strategy_path': strategy_location}).strategy
strategy = StrategyResolver.load_strategy({'strategy': strategy_name,
'user_data_dir': user_data_dir,
'strategy_path': strategy_location})
# Generate buy/sell signals using strategy
df = strategy.analyze_ticker(candles, {'pair': pair})

2
freqtrade/freqtradebot.py
View File

@ -55,7 +55,7 @@ class FreqtradeBot:
self.heartbeat_interval = self.config.get('internals', {}).get('heartbeat_interval', 60)
self.strategy: IStrategy = StrategyResolver(self.config).strategy
self.strategy: IStrategy = StrategyResolver.load_strategy(self.config)
# Check config consistency here since strategies can set certain options
validate_config_consistency(config)

4
freqtrade/optimize/backtesting.py
View File

@ -75,12 +75,12 @@ class Backtesting:
for strat in list(self.config['strategy_list']):
stratconf = deepcopy(self.config)
stratconf['strategy'] = strat
self.strategylist.append(StrategyResolver(stratconf).strategy)
self.strategylist.append(StrategyResolver.load_strategy(stratconf))
validate_config_consistency(stratconf)
else:
# No strategy list specified, only one strategy
self.strategylist.append(StrategyResolver(self.config).strategy)
self.strategylist.append(StrategyResolver.load_strategy(self.config))
validate_config_consistency(self.config)
if "ticker_interval" not in self.config:

2
freqtrade/optimize/edge_cli.py
View File

@ -34,7 +34,7 @@ class EdgeCli:
remove_credentials(self.config)
self.config['stake_amount'] = constants.UNLIMITED_STAKE_AMOUNT
self.exchange = Exchange(self.config)
self.strategy = StrategyResolver(self.config).strategy
self.strategy = StrategyResolver.load_strategy(self.config)
validate_config_consistency(self.config)

2
freqtrade/plot/plotting.py
View File

@ -340,7 +340,7 @@ def load_and_plot_trades(config: Dict[str, Any]):
- Generate plot files
:return: None
"""
strategy = StrategyResolver(config).strategy
strategy = StrategyResolver.load_strategy(config)
plot_elements = init_plotscript(config)
trades = plot_elements['trades']

65
freqtrade/resolvers/strategy_resolver.py
View File

@ -20,12 +20,11 @@ logger = logging.getLogger(__name__)
class StrategyResolver(IResolver):
"""
This class contains all the logic to load custom strategy class
This class contains the logic to load custom strategy class
"""
__slots__ = ['strategy']
def __init__(self, config: Optional[Dict] = None) -> None:
@staticmethod
def load_strategy(config: Optional[Dict] = None) -> IStrategy:
"""
Load the custom class from config parameter
:param config: configuration dictionary or None
@ -37,9 +36,9 @@ class StrategyResolver(IResolver):
"the strategy class to use.")
strategy_name = config['strategy']
self.strategy: IStrategy = self._load_strategy(strategy_name,
config=config,
extra_dir=config.get('strategy_path'))
strategy: IStrategy = StrategyResolver._load_strategy(
strategy_name, config=config,
extra_dir=config.get('strategy_path'))
# make sure ask_strategy dict is available
if 'ask_strategy' not in config:
@ -68,9 +67,11 @@ class StrategyResolver(IResolver):
]
for attribute, default, ask_strategy in attributes:
if ask_strategy:
self._override_attribute_helper(config['ask_strategy'], attribute, default)
StrategyResolver._override_attribute_helper(strategy, config['ask_strategy'],
attribute, default)
else:
self._override_attribute_helper(config, attribute, default)
StrategyResolver._override_attribute_helper(strategy, config,
attribute, default)
# Loop this list again to have output combined
for attribute, _, exp in attributes:
@ -80,14 +81,16 @@ class StrategyResolver(IResolver):
logger.info("Strategy using %s: %s", attribute, config[attribute])
# Sort and apply type conversions
self.strategy.minimal_roi = OrderedDict(sorted(
{int(key): value for (key, value) in self.strategy.minimal_roi.items()}.items(),
strategy.minimal_roi = OrderedDict(sorted(
{int(key): value for (key, value) in strategy.minimal_roi.items()}.items(),
key=lambda t: t[0]))
self.strategy.stoploss = float(self.strategy.stoploss)
strategy.stoploss = float(strategy.stoploss)
self._strategy_sanity_validations()
StrategyResolver._strategy_sanity_validations(strategy)
return strategy
def _override_attribute_helper(self, config, attribute: str, default):
@staticmethod
def _override_attribute_helper(strategy, config, attribute: str, default):
"""
Override attributes in the strategy.
Prevalence:
@ -96,30 +99,32 @@ class StrategyResolver(IResolver):
- default (if not None)
"""
if attribute in config:
setattr(self.strategy, attribute, config[attribute])
setattr(strategy, attribute, config[attribute])
logger.info("Override strategy '%s' with value in config file: %s.",
attribute, config[attribute])
elif hasattr(self.strategy, attribute):
val = getattr(self.strategy, attribute)
elif hasattr(strategy, attribute):
val = getattr(strategy, attribute)
# None's cannot exist in the config, so do not copy them
if val is not None:
config[attribute] = val
# Explicitly check for None here as other "falsy" values are possible
elif default is not None:
setattr(self.strategy, attribute, default)
setattr(strategy, attribute, default)
config[attribute] = default
def _strategy_sanity_validations(self):
if not all(k in self.strategy.order_types for k in constants.REQUIRED_ORDERTYPES):
raise ImportError(f"Impossible to load Strategy '{self.strategy.__class__.__name__}'. "
@staticmethod
def _strategy_sanity_validations(strategy):
if not all(k in strategy.order_types for k in constants.REQUIRED_ORDERTYPES):
raise ImportError(f"Impossible to load Strategy '{strategy.__class__.__name__}'. "
f"Order-types mapping is incomplete.")
if not all(k in self.strategy.order_time_in_force for k in constants.REQUIRED_ORDERTIF):
raise ImportError(f"Impossible to load Strategy '{self.strategy.__class__.__name__}'. "
if not all(k in strategy.order_time_in_force for k in constants.REQUIRED_ORDERTIF):
raise ImportError(f"Impossible to load Strategy '{strategy.__class__.__name__}'. "
f"Order-time-in-force mapping is incomplete.")
def _load_strategy(
self, strategy_name: str, config: dict, extra_dir: Optional[str] = None) -> IStrategy:
@staticmethod
def _load_strategy(strategy_name: str,
config: dict, extra_dir: Optional[str] = None) -> IStrategy:
"""
Search and loads the specified strategy.
:param strategy_name: name of the module to import
@ -129,9 +134,9 @@ class StrategyResolver(IResolver):
"""
current_path = Path(__file__).parent.parent.joinpath('strategy').resolve()
abs_paths = self.build_search_paths(config, current_path=current_path,
user_subdir=constants.USERPATH_STRATEGY,
extra_dir=extra_dir)
abs_paths = IResolver.build_search_paths(config, current_path=current_path,
user_subdir=constants.USERPATH_STRATEGY,
extra_dir=extra_dir)
if ":" in strategy_name:
logger.info("loading base64 encoded strategy")
@ -149,8 +154,8 @@ class StrategyResolver(IResolver):
# register temp path with the bot
abs_paths.insert(0, temp.resolve())
strategy = self._load_object(paths=abs_paths, object_type=IStrategy,
object_name=strategy_name, kwargs={'config': config})
strategy = IResolver._load_object(paths=abs_paths, object_type=IStrategy,
object_name=strategy_name, kwargs={'config': config})
if strategy:
strategy._populate_fun_len = len(getfullargspec(strategy.populate_indicators).args)
strategy._buy_fun_len = len(getfullargspec(strategy.populate_buy_trend).args)

6
freqtrade/templates/strategy_analysis_example.ipynb
View File

@ -73,9 +73,9 @@
"source": [
"# Load strategy using values set above\n",
"from freqtrade.resolvers import StrategyResolver\n",
"strategy = StrategyResolver({'strategy': strategy_name,\n",
" 'user_data_dir': user_data_dir,\n",
" 'strategy_path': strategy_location}).strategy\n",
"strategy = StrategyResolver.load_strategy({'strategy': strategy_name,\n",
" 'user_data_dir': user_data_dir,\n",
" 'strategy_path': strategy_location})\n",
"\n",
"# Generate buy/sell signals using strategy\n",
"df = strategy.analyze_ticker(candles, {'pair': pair})\n",

141
tests/strategy/test_strategy.py
View File

@ -39,8 +39,8 @@ def test_load_strategy(default_conf, result):
default_conf.update({'strategy': 'SampleStrategy',
'strategy_path': str(Path(__file__).parents[2] / 'freqtrade/templates')
})
resolver = StrategyResolver(default_conf)
assert 'rsi' in resolver.strategy.advise_indicators(result, {'pair': 'ETH/BTC'})
strategy = StrategyResolver.load_strategy(default_conf)
assert 'rsi' in strategy.advise_indicators(result, {'pair': 'ETH/BTC'})
def test_load_strategy_base64(result, caplog, default_conf):
@ -48,8 +48,8 @@ def test_load_strategy_base64(result, caplog, default_conf):
encoded_string = urlsafe_b64encode(file.read()).decode("utf-8")
default_conf.update({'strategy': 'SampleStrategy:{}'.format(encoded_string)})
resolver = StrategyResolver(default_conf)
assert 'rsi' in resolver.strategy.advise_indicators(result, {'pair': 'ETH/BTC'})
strategy = StrategyResolver.load_strategy(default_conf)
assert 'rsi' in 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 SampleStrategy from '"
r".*(/|\\).*(/|\\)SampleStrategy\.py'\.\.\.", caplog)
@ -57,13 +57,12 @@ def test_load_strategy_base64(result, caplog, default_conf):
def test_load_strategy_invalid_directory(result, caplog, default_conf):
default_conf['strategy'] = 'DefaultStrategy'
resolver = StrategyResolver(default_conf)
extra_dir = Path.cwd() / 'some/path'
resolver._load_strategy('DefaultStrategy', config=default_conf, extra_dir=extra_dir)
strategy = StrategyResolver._load_strategy('DefaultStrategy', config=default_conf, extra_dir=extra_dir)
assert log_has_re(r'Path .*' + r'some.*path.*' + r'.* does not exist', caplog)
assert 'rsi' in resolver.strategy.advise_indicators(result, {'pair': 'ETH/BTC'})
assert 'rsi' in strategy.advise_indicators(result, {'pair': 'ETH/BTC'})
def test_load_not_found_strategy(default_conf):
@ -71,7 +70,7 @@ def test_load_not_found_strategy(default_conf):
with pytest.raises(OperationalException,
match=r"Impossible to load Strategy 'NotFoundStrategy'. "
r"This class does not exist or contains Python code errors."):
StrategyResolver(default_conf)
StrategyResolver.load_strategy(default_conf)
def test_load_strategy_noname(default_conf):
@ -79,30 +78,30 @@ def test_load_strategy_noname(default_conf):
with pytest.raises(OperationalException,
match="No strategy set. Please use `--strategy` to specify "
"the strategy class to use."):
StrategyResolver(default_conf)
StrategyResolver.load_strategy(default_conf)
def test_strategy(result, default_conf):
default_conf.update({'strategy': 'DefaultStrategy'})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
metadata = {'pair': 'ETH/BTC'}
assert resolver.strategy.minimal_roi[0] == 0.04
assert strategy.minimal_roi[0] == 0.04
assert default_conf["minimal_roi"]['0'] == 0.04
assert resolver.strategy.stoploss == -0.10
assert strategy.stoploss == -0.10
assert default_conf['stoploss'] == -0.10
assert resolver.strategy.ticker_interval == '5m'
assert strategy.ticker_interval == '5m'
assert default_conf['ticker_interval'] == '5m'
df_indicators = resolver.strategy.advise_indicators(result, metadata=metadata)
df_indicators = strategy.advise_indicators(result, metadata=metadata)
assert 'adx' in df_indicators
dataframe = resolver.strategy.advise_buy(df_indicators, metadata=metadata)
dataframe = strategy.advise_buy(df_indicators, metadata=metadata)
assert 'buy' in dataframe.columns
dataframe = resolver.strategy.advise_sell(df_indicators, metadata=metadata)
dataframe = strategy.advise_sell(df_indicators, metadata=metadata)
assert 'sell' in dataframe.columns
@ -114,9 +113,9 @@ def test_strategy_override_minimal_roi(caplog, default_conf):
"0": 0.5
}
})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
assert resolver.strategy.minimal_roi[0] == 0.5
assert strategy.minimal_roi[0] == 0.5
assert log_has("Override strategy 'minimal_roi' with value in config file: {'0': 0.5}.", caplog)
@ -126,9 +125,9 @@ def test_strategy_override_stoploss(caplog, default_conf):
'strategy': 'DefaultStrategy',
'stoploss': -0.5
})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
assert resolver.strategy.stoploss == -0.5
assert strategy.stoploss == -0.5
assert log_has("Override strategy 'stoploss' with value in config file: -0.5.", caplog)
@ -138,10 +137,10 @@ def test_strategy_override_trailing_stop(caplog, default_conf):
'strategy': 'DefaultStrategy',
'trailing_stop': True
})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
assert resolver.strategy.trailing_stop
assert isinstance(resolver.strategy.trailing_stop, bool)
assert strategy.trailing_stop
assert isinstance(strategy.trailing_stop, bool)
assert log_has("Override strategy 'trailing_stop' with value in config file: True.", caplog)
@ -153,13 +152,13 @@ def test_strategy_override_trailing_stop_positive(caplog, default_conf):
'trailing_stop_positive_offset': -0.2
})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
assert resolver.strategy.trailing_stop_positive == -0.1
assert strategy.trailing_stop_positive == -0.1
assert log_has("Override strategy 'trailing_stop_positive' with value in config file: -0.1.",
caplog)
assert resolver.strategy.trailing_stop_positive_offset == -0.2
assert strategy.trailing_stop_positive_offset == -0.2
assert log_has("Override strategy 'trailing_stop_positive' with value in config file: -0.1.",
caplog)
@ -172,10 +171,10 @@ def test_strategy_override_ticker_interval(caplog, default_conf):
'ticker_interval': 60,
'stake_currency': 'ETH'
})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
assert resolver.strategy.ticker_interval == 60
assert resolver.strategy.stake_currency == 'ETH'
assert strategy.ticker_interval == 60
assert strategy.stake_currency == 'ETH'
assert log_has("Override strategy 'ticker_interval' with value in config file: 60.",
caplog)
@ -187,9 +186,9 @@ def test_strategy_override_process_only_new_candles(caplog, default_conf):
'strategy': 'DefaultStrategy',
'process_only_new_candles': True
})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
assert resolver.strategy.process_only_new_candles
assert strategy.process_only_new_candles
assert log_has("Override strategy 'process_only_new_candles' with value in config file: True.",
caplog)
@ -207,11 +206,11 @@ def test_strategy_override_order_types(caplog, default_conf):
'strategy': 'DefaultStrategy',
'order_types': order_types
})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
assert resolver.strategy.order_types
assert strategy.order_types
for method in ['buy', 'sell', 'stoploss', 'stoploss_on_exchange']:
assert resolver.strategy.order_types[method] == order_types[method]
assert strategy.order_types[method] == order_types[method]
assert log_has("Override strategy 'order_types' with value in config file:"
" {'buy': 'market', 'sell': 'limit', 'stoploss': 'limit',"
@ -225,7 +224,7 @@ def test_strategy_override_order_types(caplog, default_conf):
with pytest.raises(ImportError,
match=r"Impossible to load Strategy 'DefaultStrategy'. "
r"Order-types mapping is incomplete."):
StrategyResolver(default_conf)
StrategyResolver.load_strategy(default_conf)
def test_strategy_override_order_tif(caplog, default_conf):
@ -240,11 +239,11 @@ def test_strategy_override_order_tif(caplog, default_conf):
'strategy': 'DefaultStrategy',
'order_time_in_force': order_time_in_force
})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
assert resolver.strategy.order_time_in_force
assert strategy.order_time_in_force
for method in ['buy', 'sell']:
assert resolver.strategy.order_time_in_force[method] == order_time_in_force[method]
assert strategy.order_time_in_force[method] == order_time_in_force[method]
assert log_has("Override strategy 'order_time_in_force' with value in config file:"
" {'buy': 'fok', 'sell': 'gtc'}.", caplog)
@ -257,7 +256,7 @@ def test_strategy_override_order_tif(caplog, default_conf):
with pytest.raises(ImportError,
match=r"Impossible to load Strategy 'DefaultStrategy'. "
r"Order-time-in-force mapping is incomplete."):
StrategyResolver(default_conf)
StrategyResolver.load_strategy(default_conf)
def test_strategy_override_use_sell_signal(caplog, default_conf):
@ -265,9 +264,9 @@ def test_strategy_override_use_sell_signal(caplog, default_conf):
default_conf.update({
'strategy': 'DefaultStrategy',
})
resolver = StrategyResolver(default_conf)
assert resolver.strategy.use_sell_signal
assert isinstance(resolver.strategy.use_sell_signal, bool)
strategy = StrategyResolver.load_strategy(default_conf)
assert strategy.use_sell_signal
assert isinstance(strategy.use_sell_signal, bool)
# must be inserted to configuration
assert 'use_sell_signal' in default_conf['ask_strategy']
assert default_conf['ask_strategy']['use_sell_signal']
@ -278,10 +277,10 @@ def test_strategy_override_use_sell_signal(caplog, default_conf):
'use_sell_signal': False,
},
})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
assert not resolver.strategy.use_sell_signal
assert isinstance(resolver.strategy.use_sell_signal, bool)
assert not strategy.use_sell_signal
assert isinstance(strategy.use_sell_signal, bool)
assert log_has("Override strategy 'use_sell_signal' with value in config file: False.", caplog)
@ -290,9 +289,9 @@ def test_strategy_override_use_sell_profit_only(caplog, default_conf):
default_conf.update({
'strategy': 'DefaultStrategy',
})
resolver = StrategyResolver(default_conf)
assert not resolver.strategy.sell_profit_only
assert isinstance(resolver.strategy.sell_profit_only, bool)
strategy = StrategyResolver.load_strategy(default_conf)
assert not strategy.sell_profit_only
assert isinstance(strategy.sell_profit_only, bool)
# must be inserted to configuration
assert 'sell_profit_only' in default_conf['ask_strategy']
assert not default_conf['ask_strategy']['sell_profit_only']
@ -303,10 +302,10 @@ def test_strategy_override_use_sell_profit_only(caplog, default_conf):
'sell_profit_only': True,
},
})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
assert resolver.strategy.sell_profit_only
assert isinstance(resolver.strategy.sell_profit_only, bool)
assert strategy.sell_profit_only
assert isinstance(strategy.sell_profit_only, bool)
assert log_has("Override strategy 'sell_profit_only' with value in config file: True.", caplog)
@ -315,11 +314,11 @@ def test_deprecate_populate_indicators(result, default_conf):
default_location = path.join(path.dirname(path.realpath(__file__)))
default_conf.update({'strategy': 'TestStrategyLegacy',
'strategy_path': default_location})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
with warnings.catch_warnings(record=True) as w:
# Cause all warnings to always be triggered.
warnings.simplefilter("always")
indicators = resolver.strategy.advise_indicators(result, {'pair': 'ETH/BTC'})
indicators = strategy.advise_indicators(result, {'pair': 'ETH/BTC'})
assert len(w) == 1
assert issubclass(w[-1].category, DeprecationWarning)
assert "deprecated - check out the Sample strategy to see the current function headers!" \
@ -328,7 +327,7 @@ def test_deprecate_populate_indicators(result, default_conf):
with warnings.catch_warnings(record=True) as w:
# Cause all warnings to always be triggered.
warnings.simplefilter("always")
resolver.strategy.advise_buy(indicators, {'pair': 'ETH/BTC'})
strategy.advise_buy(indicators, {'pair': 'ETH/BTC'})
assert len(w) == 1
assert issubclass(w[-1].category, DeprecationWarning)
assert "deprecated - check out the Sample strategy to see the current function headers!" \
@ -337,7 +336,7 @@ def test_deprecate_populate_indicators(result, default_conf):
with warnings.catch_warnings(record=True) as w:
# Cause all warnings to always be triggered.
warnings.simplefilter("always")
resolver.strategy.advise_sell(indicators, {'pair': 'ETH_BTC'})
strategy.advise_sell(indicators, {'pair': 'ETH_BTC'})
assert len(w) == 1
assert issubclass(w[-1].category, DeprecationWarning)
assert "deprecated - check out the Sample strategy to see the current function headers!" \
@ -349,47 +348,47 @@ def test_call_deprecated_function(result, monkeypatch, default_conf):
default_location = path.join(path.dirname(path.realpath(__file__)))
default_conf.update({'strategy': 'TestStrategyLegacy',
'strategy_path': default_location})
resolver = StrategyResolver(default_conf)
strategy = StrategyResolver.load_strategy(default_conf)
metadata = {'pair': 'ETH/BTC'}
# Make sure we are using a legacy function
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
assert strategy._populate_fun_len == 2
assert strategy._buy_fun_len == 2
assert strategy._sell_fun_len == 2
assert strategy.INTERFACE_VERSION == 1
indicator_df = resolver.strategy.advise_indicators(result, metadata=metadata)
indicator_df = 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)
buydf = strategy.advise_buy(result, metadata=metadata)
assert isinstance(buydf, DataFrame)
assert 'buy' in buydf.columns
selldf = resolver.strategy.advise_sell(result, metadata=metadata)
selldf = 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)
strategy = StrategyResolver.load_strategy(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
assert strategy._populate_fun_len == 3
assert strategy._buy_fun_len == 3
assert strategy._sell_fun_len == 3
assert strategy.INTERFACE_VERSION == 2
indicator_df = resolver.strategy.advise_indicators(result, metadata=metadata)
indicator_df = 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)
buydf = strategy.advise_buy(result, metadata=metadata)
assert isinstance(buydf, DataFrame)
assert 'buy' in buydf.columns
selldf = resolver.strategy.advise_sell(result, metadata=metadata)
selldf = strategy.advise_sell(result, metadata=metadata)
assert isinstance(selldf, DataFrame)
assert 'sell' in selldf