diff --git a/freqtrade/data/converter.py b/freqtrade/data/converter.py
index bdb8c3464..c087c87ff 100644
--- a/freqtrade/data/converter.py
+++ b/freqtrade/data/converter.py
@@ -11,7 +11,7 @@ import pandas as pd
 from pandas import DataFrame, to_datetime
 
 from freqtrade.constants import DEFAULT_DATAFRAME_COLUMNS, DEFAULT_TRADES_COLUMNS, TradeList
-from freqtrade.enums.candletype import CandleType
+from freqtrade.enums import CandleType
 
 
 logger = logging.getLogger(__name__)
diff --git a/freqtrade/data/dataprovider.py b/freqtrade/data/dataprovider.py
index 3e6eccdc8..12b02f744 100644
--- a/freqtrade/data/dataprovider.py
+++ b/freqtrade/data/dataprovider.py
@@ -13,8 +13,7 @@ from pandas import DataFrame
 from freqtrade.configuration import TimeRange
 from freqtrade.constants import ListPairsWithTimeframes, PairWithTimeframe
 from freqtrade.data.history import load_pair_history
-from freqtrade.enums import RunMode
-from freqtrade.enums.candletype import CandleType
+from freqtrade.enums import CandleType, RunMode
 from freqtrade.exceptions import ExchangeError, OperationalException
 from freqtrade.exchange import Exchange, timeframe_to_seconds
 
@@ -223,7 +222,7 @@ class DataProvider:
             raise OperationalException(NO_EXCHANGE_EXCEPTION)
         if self.runmode in (RunMode.DRY_RUN, RunMode.LIVE):
             return self._exchange.klines(
-                (pair, timeframe or self._config['timeframe'], candle_type),
+                (pair, timeframe or self._config['timeframe'], CandleType.from_string(candle_type)),
                 copy=copy
             )
         else:
diff --git a/freqtrade/data/history/hdf5datahandler.py b/freqtrade/data/history/hdf5datahandler.py
index b9585e22a..fe840527f 100644
--- a/freqtrade/data/history/hdf5datahandler.py
+++ b/freqtrade/data/history/hdf5datahandler.py
@@ -9,7 +9,7 @@ import pandas as pd
 from freqtrade.configuration import TimeRange
 from freqtrade.constants import (DEFAULT_DATAFRAME_COLUMNS, DEFAULT_TRADES_COLUMNS,
                                  ListPairsWithTimeframes, TradeList)
-from freqtrade.enums.candletype import CandleType
+from freqtrade.enums import CandleType
 
 from .idatahandler import IDataHandler
 
diff --git a/freqtrade/data/history/history_utils.py b/freqtrade/data/history/history_utils.py
index 3fdb36e58..e9c31259f 100644
--- a/freqtrade/data/history/history_utils.py
+++ b/freqtrade/data/history/history_utils.py
@@ -12,7 +12,7 @@ from freqtrade.constants import DEFAULT_DATAFRAME_COLUMNS
 from freqtrade.data.converter import (clean_ohlcv_dataframe, ohlcv_to_dataframe,
                                       trades_remove_duplicates, trades_to_ohlcv)
 from freqtrade.data.history.idatahandler import IDataHandler, get_datahandler
-from freqtrade.enums.candletype import CandleType
+from freqtrade.enums import CandleType
 from freqtrade.exceptions import OperationalException
 from freqtrade.exchange import Exchange
 from freqtrade.misc import format_ms_time
diff --git a/freqtrade/data/history/idatahandler.py b/freqtrade/data/history/idatahandler.py
index 72758a325..239c9ab71 100644
--- a/freqtrade/data/history/idatahandler.py
+++ b/freqtrade/data/history/idatahandler.py
@@ -17,7 +17,7 @@ from freqtrade import misc
 from freqtrade.configuration import TimeRange
 from freqtrade.constants import ListPairsWithTimeframes, TradeList
 from freqtrade.data.converter import clean_ohlcv_dataframe, trades_remove_duplicates, trim_dataframe
-from freqtrade.enums.candletype import CandleType
+from freqtrade.enums import CandleType
 from freqtrade.exchange import timeframe_to_seconds
 
 
diff --git a/freqtrade/data/history/jsondatahandler.py b/freqtrade/data/history/jsondatahandler.py
index b4775f271..1ed5ae023 100644
--- a/freqtrade/data/history/jsondatahandler.py
+++ b/freqtrade/data/history/jsondatahandler.py
@@ -10,7 +10,7 @@ from freqtrade import misc
 from freqtrade.configuration import TimeRange
 from freqtrade.constants import DEFAULT_DATAFRAME_COLUMNS, ListPairsWithTimeframes, TradeList
 from freqtrade.data.converter import trades_dict_to_list
-from freqtrade.enums.candletype import CandleType
+from freqtrade.enums import CandleType
 
 from .idatahandler import IDataHandler
 
diff --git a/freqtrade/exchange/binance.py b/freqtrade/exchange/binance.py
index ad18efcf5..db6cda4d7 100644
--- a/freqtrade/exchange/binance.py
+++ b/freqtrade/exchange/binance.py
@@ -8,7 +8,7 @@ from typing import Dict, List, Optional, Tuple
 import arrow
 import ccxt
 
-from freqtrade.enums import Collateral, TradingMode
+from freqtrade.enums import CandleType, Collateral, TradingMode
 from freqtrade.exceptions import (DDosProtection, InsufficientFundsError, InvalidOrderException,
                                   OperationalException, TemporaryError)
 from freqtrade.exchange import Exchange
@@ -197,14 +197,13 @@ class Binance(Exchange):
             raise OperationalException(e) from e
 
     async def _async_get_historic_ohlcv(self, pair: str, timeframe: str,
-                                        since_ms: int, is_new_pair: bool = False,
-                                        raise_: bool = False,
-                                        candle_type: str = ''
+                                        since_ms: int, candle_type: CandleType,
+                                        is_new_pair: bool = False, raise_: bool = False,
                                         ) -> Tuple[str, str, str, List]:
         """
         Overwrite to introduce "fast new pair" functionality by detecting the pair's listing date
         Does not work for other exchanges, which don't return the earliest data when called with "0"
-        :param candle_type: '', mark, index, premiumIndex, or funding_rate
+        :param candle_type: Any of the enum CandleType (must match trading mode!)
         """
         if is_new_pair:
             x = await self._async_get_candle_history(pair, timeframe, 0, candle_type)
diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index 329cecc3d..e75735c04 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -20,9 +20,9 @@ from ccxt.base.decimal_to_precision import (ROUND_DOWN, ROUND_UP, TICK_SIZE, TRU
 from pandas import DataFrame
 
 from freqtrade.constants import (DEFAULT_AMOUNT_RESERVE_PERCENT, NON_OPEN_EXCHANGE_STATES,
-                                 ListPairsWithTimeframes)
+                                 ListPairsWithTimeframes, PairWithTimeframe)
 from freqtrade.data.converter import ohlcv_to_dataframe, trades_dict_to_list
-from freqtrade.enums import Collateral, TradingMode
+from freqtrade.enums import CandleType, Collateral, TradingMode
 from freqtrade.exceptions import (DDosProtection, ExchangeError, InsufficientFundsError,
                                   InvalidOrderException, OperationalException, PricingError,
                                   RetryableOrderError, TemporaryError)
@@ -92,7 +92,7 @@ class Exchange:
         self._config.update(config)
 
         # Holds last candle refreshed time of each pair
-        self._pairs_last_refresh_time: Dict[Tuple[str, str, str], int] = {}
+        self._pairs_last_refresh_time: Dict[PairWithTimeframe, int] = {}
         # Timestamp of last markets refresh
         self._last_markets_refresh: int = 0
 
@@ -105,7 +105,7 @@ class Exchange:
         self._buy_rate_cache: TTLCache = TTLCache(maxsize=100, ttl=1800)
 
         # Holds candles
-        self._klines: Dict[Tuple[str, str, str], DataFrame] = {}
+        self._klines: Dict[PairWithTimeframe, DataFrame] = {}
 
         # Holds all open sell orders for dry_run
         self._dry_run_open_orders: Dict[str, Any] = {}
@@ -359,7 +359,7 @@ class Exchange:
             or (self.trading_mode == TradingMode.FUTURES and self.market_is_future(market))
         )
 
-    def klines(self, pair_interval: Tuple[str, str, str], copy: bool = True) -> DataFrame:
+    def klines(self, pair_interval: PairWithTimeframe, copy: bool = True) -> DataFrame:
         if pair_interval in self._klines:
             return self._klines[pair_interval].copy() if copy else self._klines[pair_interval]
         else:
@@ -1314,8 +1314,8 @@ class Exchange:
     # Historic data
 
     def get_historic_ohlcv(self, pair: str, timeframe: str,
-                           since_ms: int, is_new_pair: bool = False,
-                           candle_type: str = '') -> List:
+                           since_ms: int, candle_type: CandleType,
+                           is_new_pair: bool = False) -> List:
         """
         Get candle history using asyncio and returns the list of candles.
         Handles all async work for this.
@@ -1327,7 +1327,7 @@ class Exchange:
         :return: List with candle (OHLCV) data
         """
         data: List
-        pair, timeframe, candle_type, data = asyncio.get_event_loop().run_until_complete(
+        pair, _, _, data = asyncio.get_event_loop().run_until_complete(
             self._async_get_historic_ohlcv(pair=pair, timeframe=timeframe,
                                            since_ms=since_ms, is_new_pair=is_new_pair,
                                            candle_type=candle_type))
@@ -1335,13 +1335,13 @@ class Exchange:
         return data
 
     def get_historic_ohlcv_as_df(self, pair: str, timeframe: str,
-                                 since_ms: int, candle_type: str = '') -> DataFrame:
+                                 since_ms: int, candle_type: CandleType) -> DataFrame:
         """
         Minimal wrapper around get_historic_ohlcv - converting the result into a dataframe
         :param pair: Pair to download
         :param timeframe: Timeframe to get data for
         :param since_ms: Timestamp in milliseconds to get history from
-        :param candle_type: '', mark, index, premiumIndex, or funding_rate
+        :param candle_type: Any of the enum CandleType (must match trading mode!)
         :return: OHLCV DataFrame
         """
         ticks = self.get_historic_ohlcv(pair, timeframe, since_ms=since_ms, candle_type=candle_type)
@@ -1349,14 +1349,13 @@ class Exchange:
                                   drop_incomplete=self._ohlcv_partial_candle)
 
     async def _async_get_historic_ohlcv(self, pair: str, timeframe: str,
-                                        since_ms: int, is_new_pair: bool = False,
-                                        raise_: bool = False,
-                                        candle_type: str = ''
+                                        since_ms: int, candle_type: CandleType,
+                                        is_new_pair: bool = False, raise_: bool = False,
                                         ) -> Tuple[str, str, str, List]:
         """
         Download historic ohlcv
         :param is_new_pair: used by binance subclass to allow "fast" new pair downloading
-        :param candle_type: '', mark, index, premiumIndex, or funding_rate
+        :param candle_type: Any of the enum CandleType (must match trading mode!)
         """
 
         one_call = timeframe_to_msecs(timeframe) * self.ohlcv_candle_limit(timeframe)
@@ -1391,8 +1390,8 @@ class Exchange:
 
     def refresh_latest_ohlcv(self, pair_list: ListPairsWithTimeframes, *,
                              since_ms: Optional[int] = None, cache: bool = True,
-                             candle_type: str = ''
-                             ) -> Dict[Tuple[str, str, str], DataFrame]:
+                             candle_type: CandleType = CandleType.SPOT_
+                             ) -> Dict[PairWithTimeframe, DataFrame]:
         """
         Refresh in-memory OHLCV asynchronously and set `_klines` with the result
         Loops asynchronously over pair_list and downloads all pairs async (semi-parallel).
@@ -1410,7 +1409,7 @@ class Exchange:
         # Gather coroutines to run
         for pair, timeframe, candle_type in set(pair_list):
             if ((pair, timeframe, candle_type) not in self._klines or not cache
-                    or self._now_is_time_to_refresh(pair, timeframe)):
+                    or self._now_is_time_to_refresh(pair, timeframe, candle_type)):
                 if not since_ms and self.required_candle_call_count > 1:
                     # Multiple calls for one pair - to get more history
                     one_call = timeframe_to_msecs(timeframe) * self.ohlcv_candle_limit(timeframe)
@@ -1463,12 +1462,7 @@ class Exchange:
 
         return results_df
 
-    def _now_is_time_to_refresh(
-        self,
-        pair: str,
-        timeframe: str,
-        candle_type: str = ''
-    ) -> bool:
+    def _now_is_time_to_refresh(self, pair: str, timeframe: str, candle_type: CandleType) -> bool:
         # Timeframe in seconds
         interval_in_sec = timeframe_to_seconds(timeframe)
 
diff --git a/freqtrade/optimize/backtesting.py b/freqtrade/optimize/backtesting.py
index 95c92ee0b..43401be46 100644
--- a/freqtrade/optimize/backtesting.py
+++ b/freqtrade/optimize/backtesting.py
@@ -17,9 +17,7 @@ from freqtrade.data import history
 from freqtrade.data.btanalysis import trade_list_to_dataframe
 from freqtrade.data.converter import trim_dataframe, trim_dataframes
 from freqtrade.data.dataprovider import DataProvider
-from freqtrade.enums import BacktestState, SellType
-from freqtrade.enums.candletype import CandleType
-from freqtrade.enums.tradingmode import TradingMode
+from freqtrade.enums import BacktestState, CandleType, SellType, TradingMode
 from freqtrade.exceptions import DependencyException, OperationalException
 from freqtrade.exchange import timeframe_to_minutes, timeframe_to_seconds
 from freqtrade.mixins import LoggingMixin
diff --git a/freqtrade/plugins/pairlist/AgeFilter.py b/freqtrade/plugins/pairlist/AgeFilter.py
index f2e9aa4d3..de7e26336 100644
--- a/freqtrade/plugins/pairlist/AgeFilter.py
+++ b/freqtrade/plugins/pairlist/AgeFilter.py
@@ -9,6 +9,7 @@ import arrow
 from pandas import DataFrame
 
 from freqtrade.configuration import PeriodicCache
+from freqtrade.enums import CandleType
 from freqtrade.exceptions import OperationalException
 from freqtrade.misc import plural
 from freqtrade.plugins.pairlist.IPairList import IPairList
@@ -72,7 +73,7 @@ class AgeFilter(IPairList):
         :return: new allowlist
         """
         needed_pairs = [
-            (p, '1d', '') for p in pairlist
+            (p, '1d', CandleType.SPOT_) for p in pairlist
             if p not in self._symbolsChecked and p not in self._symbolsCheckFailed]
         if not needed_pairs:
             # Remove pairs that have been removed before
@@ -88,7 +89,8 @@ class AgeFilter(IPairList):
         candles = self._exchange.refresh_latest_ohlcv(needed_pairs, since_ms=since_ms, cache=False)
         if self._enabled:
             for p in deepcopy(pairlist):
-                daily_candles = candles[(p, '1d', '')] if (p, '1d', '') in candles else None
+                daily_candles = candles[(p, '1d', CandleType.SPOT_)] if (
+                    p, '1d', CandleType.SPOT_) in candles else None
                 if not self._validate_pair_loc(p, daily_candles):
                     pairlist.remove(p)
         self.log_once(f"Validated {len(pairlist)} pairs.", logger.info)
diff --git a/freqtrade/plugins/pairlist/ShuffleFilter.py b/freqtrade/plugins/pairlist/ShuffleFilter.py
index 55cf9938f..663bba49b 100644
--- a/freqtrade/plugins/pairlist/ShuffleFilter.py
+++ b/freqtrade/plugins/pairlist/ShuffleFilter.py
@@ -5,7 +5,7 @@ import logging
 import random
 from typing import Any, Dict, List
 
-from freqtrade.enums.runmode import RunMode
+from freqtrade.enums import RunMode
 from freqtrade.plugins.pairlist.IPairList import IPairList
 
 
diff --git a/freqtrade/plugins/pairlist/VolatilityFilter.py b/freqtrade/plugins/pairlist/VolatilityFilter.py
index c06cd0897..299ea8c18 100644
--- a/freqtrade/plugins/pairlist/VolatilityFilter.py
+++ b/freqtrade/plugins/pairlist/VolatilityFilter.py
@@ -11,6 +11,7 @@ import numpy as np
 from cachetools.ttl import TTLCache
 from pandas import DataFrame
 
+from freqtrade.enums import CandleType
 from freqtrade.exceptions import OperationalException
 from freqtrade.misc import plural
 from freqtrade.plugins.pairlist.IPairList import IPairList
@@ -67,7 +68,7 @@ class VolatilityFilter(IPairList):
         :param tickers: Tickers (from exchange.get_tickers()). May be cached.
         :return: new allowlist
         """
-        needed_pairs = [(p, '1d', '') for p in pairlist if p not in self._pair_cache]
+        needed_pairs = [(p, '1d', CandleType.SPOT_) for p in pairlist if p not in self._pair_cache]
 
         since_ms = (arrow.utcnow()
                          .floor('day')
@@ -81,7 +82,8 @@ class VolatilityFilter(IPairList):
 
         if self._enabled:
             for p in deepcopy(pairlist):
-                daily_candles = candles[(p, '1d', '')] if (p, '1d', '') in candles else None
+                daily_candles = candles[(p, '1d', CandleType.SPOT_)] if (
+                    p, '1d', CandleType.SPOT_) in candles else None
                 if not self._validate_pair_loc(p, daily_candles):
                     pairlist.remove(p)
         return pairlist
diff --git a/freqtrade/plugins/pairlist/VolumePairList.py b/freqtrade/plugins/pairlist/VolumePairList.py
index 0493b67c9..7c9c9933a 100644
--- a/freqtrade/plugins/pairlist/VolumePairList.py
+++ b/freqtrade/plugins/pairlist/VolumePairList.py
@@ -10,6 +10,7 @@ from typing import Any, Dict, List
 import arrow
 from cachetools.ttl import TTLCache
 
+from freqtrade.enums import CandleType
 from freqtrade.exceptions import OperationalException
 from freqtrade.exchange import timeframe_to_minutes
 from freqtrade.misc import format_ms_time
@@ -160,7 +161,7 @@ class VolumePairList(IPairList):
                           f"{self._lookback_timeframe}, starting from {format_ms_time(since_ms)} "
                           f"till {format_ms_time(to_ms)}", logger.info)
             needed_pairs = [
-                (p, self._lookback_timeframe, '') for p in
+                (p, self._lookback_timeframe, CandleType.SPOT_) for p in
                 [s['symbol'] for s in filtered_tickers]
                 if p not in self._pair_cache
             ]
@@ -173,8 +174,8 @@ class VolumePairList(IPairList):
                 )
             for i, p in enumerate(filtered_tickers):
                 pair_candles = candles[
-                    (p['symbol'], self._lookback_timeframe, '')
-                ] if (p['symbol'], self._lookback_timeframe, '') in candles else None
+                    (p['symbol'], self._lookback_timeframe, CandleType.SPOT_)
+                ] if (p['symbol'], self._lookback_timeframe, CandleType.SPOT_) in candles else None
                 # in case of candle data calculate typical price and quoteVolume for candle
                 if pair_candles is not None and not pair_candles.empty:
                     pair_candles['typical_price'] = (pair_candles['high'] + pair_candles['low']
diff --git a/freqtrade/plugins/pairlist/rangestabilityfilter.py b/freqtrade/plugins/pairlist/rangestabilityfilter.py
index 048736ae0..31d92d41b 100644
--- a/freqtrade/plugins/pairlist/rangestabilityfilter.py
+++ b/freqtrade/plugins/pairlist/rangestabilityfilter.py
@@ -9,6 +9,7 @@ import arrow
 from cachetools.ttl import TTLCache
 from pandas import DataFrame
 
+from freqtrade.enums import CandleType
 from freqtrade.exceptions import OperationalException
 from freqtrade.misc import plural
 from freqtrade.plugins.pairlist.IPairList import IPairList
@@ -65,7 +66,7 @@ class RangeStabilityFilter(IPairList):
         :param tickers: Tickers (from exchange.get_tickers()). May be cached.
         :return: new allowlist
         """
-        needed_pairs = [(p, '1d', '') for p in pairlist if p not in self._pair_cache]
+        needed_pairs = [(p, '1d', CandleType.SPOT_) for p in pairlist if p not in self._pair_cache]
 
         since_ms = (arrow.utcnow()
                          .floor('day')
@@ -79,7 +80,8 @@ class RangeStabilityFilter(IPairList):
 
         if self._enabled:
             for p in deepcopy(pairlist):
-                daily_candles = candles[(p, '1d', '')] if (p, '1d', '') in candles else None
+                daily_candles = candles[(p, '1d', CandleType.SPOT_)] if (
+                    p, '1d', CandleType.SPOT_) in candles else None
                 if not self._validate_pair_loc(p, daily_candles):
                     pairlist.remove(p)
         return pairlist
diff --git a/freqtrade/plugins/pairlistmanager.py b/freqtrade/plugins/pairlistmanager.py
index 5ea4c2386..5ae9a7e35 100644
--- a/freqtrade/plugins/pairlistmanager.py
+++ b/freqtrade/plugins/pairlistmanager.py
@@ -8,6 +8,7 @@ from typing import Dict, List
 from cachetools import TTLCache, cached
 
 from freqtrade.constants import ListPairsWithTimeframes
+from freqtrade.enums import CandleType
 from freqtrade.exceptions import OperationalException
 from freqtrade.plugins.pairlist.IPairList import IPairList
 from freqtrade.plugins.pairlist.pairlist_helpers import expand_pairlist
@@ -138,4 +139,4 @@ class PairListManager():
         """
         Create list of pair tuples with (pair, timeframe)
         """
-        return [(pair, timeframe or self._config['timeframe'], '') for pair in pairs]
+        return [(pair, timeframe or self._config['timeframe'], CandleType.SPOT) for pair in pairs]
diff --git a/freqtrade/rpc/api_server/api_v1.py b/freqtrade/rpc/api_server/api_v1.py
index f69ddef43..8bf3d41f1 100644
--- a/freqtrade/rpc/api_server/api_v1.py
+++ b/freqtrade/rpc/api_server/api_v1.py
@@ -9,6 +9,7 @@ from fastapi.exceptions import HTTPException
 from freqtrade import __version__
 from freqtrade.constants import USERPATH_STRATEGIES
 from freqtrade.data.history import get_datahandler
+from freqtrade.enums import CandleType
 from freqtrade.exceptions import OperationalException
 from freqtrade.rpc import RPC
 from freqtrade.rpc.api_server.api_schemas import (AvailablePairs, Balances, BlacklistPayload,
@@ -250,7 +251,7 @@ def get_strategy(strategy: str, config=Depends(get_config)):
 
 @router.get('/available_pairs', response_model=AvailablePairs, tags=['candle data'])
 def list_available_pairs(timeframe: Optional[str] = None, stake_currency: Optional[str] = None,
-                         candletype: Optional[str] = None, config=Depends(get_config)):
+                         candletype: Optional[CandleType] = None, config=Depends(get_config)):
 
     dh = get_datahandler(config['datadir'], config.get('dataformat_ohlcv', None))
 
diff --git a/freqtrade/strategy/informative_decorator.py b/freqtrade/strategy/informative_decorator.py
index 1507f09ab..3d939e017 100644
--- a/freqtrade/strategy/informative_decorator.py
+++ b/freqtrade/strategy/informative_decorator.py
@@ -2,6 +2,7 @@ from typing import Any, Callable, NamedTuple, Optional, Union
 
 from pandas import DataFrame
 
+from freqtrade.enums import CandleType
 from freqtrade.exceptions import OperationalException
 from freqtrade.strategy.strategy_helper import merge_informative_pair
 
@@ -14,7 +15,7 @@ class InformativeData(NamedTuple):
     timeframe: str
     fmt: Union[str, Callable[[Any], str], None]
     ffill: bool
-    candle_type: str = ''
+    candle_type: CandleType = CandleType.SPOT_
 
 
 def informative(timeframe: str, asset: str = '',
diff --git a/freqtrade/strategy/interface.py b/freqtrade/strategy/interface.py
index 8abb10bc7..2a3b4e754 100644
--- a/freqtrade/strategy/interface.py
+++ b/freqtrade/strategy/interface.py
@@ -13,8 +13,7 @@ from pandas import DataFrame
 
 from freqtrade.constants import ListPairsWithTimeframes
 from freqtrade.data.dataprovider import DataProvider
-from freqtrade.enums import SellType, SignalDirection, SignalTagType, SignalType
-from freqtrade.enums.candletype import CandleType
+from freqtrade.enums import CandleType, SellType, SignalDirection, SignalTagType, SignalType
 from freqtrade.exceptions import OperationalException, StrategyError
 from freqtrade.exchange import timeframe_to_minutes, timeframe_to_seconds
 from freqtrade.exchange.exchange import timeframe_to_next_date
@@ -424,7 +423,9 @@ class IStrategy(ABC, HyperStrategyMixin):
         """
         informative_pairs = self.informative_pairs()
         # Compatibility code for 2 tuple informative pairs
-        informative_pairs = [(p[0], p[1], p[2] if len(p) > 2 else '') for p in informative_pairs]
+        informative_pairs = [
+            (p[0], p[1], CandleType.from_string(p[2]) if len(p) > 2 else CandleType.SPOT_)
+            for p in informative_pairs]
         for inf_data, _ in self._ft_informative:
             if inf_data.asset:
                 pair_tf = (