diff --git a/freqtrade/data/dataprovider.py b/freqtrade/data/dataprovider.py
index 3c8ee4b24..d25c1b553 100644
--- a/freqtrade/data/dataprovider.py
+++ b/freqtrade/data/dataprovider.py
@@ -55,6 +55,7 @@ class DataProvider:
         :param pair: pair to get the data for
         :param timeframe: Timeframe to get data for
         :param dataframe: analyzed dataframe
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         """
         self.__cached_pairs[(pair, timeframe, candle_type)] = (
             dataframe, datetime.now(timezone.utc))
@@ -75,6 +76,7 @@ class DataProvider:
         Get stored historical candle (OHLCV) data
         :param pair: pair to get the data for
         :param timeframe: timeframe to get data for
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         """
         saved_pair = (pair, str(timeframe), candle_type)
         if saved_pair not in self.__cached_pairs_backtesting:
@@ -106,6 +108,7 @@ class DataProvider:
         :param pair: pair to get the data for
         :param timeframe: timeframe to get data for
         :return: Dataframe for this pair
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         """
         if self.runmode in (RunMode.DRY_RUN, RunMode.LIVE):
             # Get live OHLCV data.
@@ -128,6 +131,7 @@ class DataProvider:
         and the last 1000 candles (up to the time evaluated at this moment) in all other modes.
         :param pair: pair to get the data for
         :param timeframe: timeframe to get data for
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: Tuple of (Analyzed Dataframe, lastrefreshed) for the requested pair / timeframe
             combination.
             Returns empty dataframe and Epoch 0 (1970-01-01) if no dataframe was cached.
@@ -212,6 +216,7 @@ class DataProvider:
         Please use the `available_pairs` method to verify which pairs are currently cached.
         :param pair: pair to get the data for
         :param timeframe: Timeframe to get data for
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :param copy: copy dataframe before returning if True.
                      Use False only for read-only operations (where the dataframe is not modified)
         """
diff --git a/freqtrade/data/history/hdf5datahandler.py b/freqtrade/data/history/hdf5datahandler.py
index 204229d2b..6e3f68f2e 100644
--- a/freqtrade/data/history/hdf5datahandler.py
+++ b/freqtrade/data/history/hdf5datahandler.py
@@ -49,6 +49,7 @@ class HDF5DataHandler(IDataHandler):
         for the specified timeframe
         :param datadir: Directory to search for ohlcv files
         :param timeframe: Timeframe to search pairs for
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: List of Pairs
         """
 
@@ -74,6 +75,7 @@ class HDF5DataHandler(IDataHandler):
         :param pair: Pair - used to generate filename
         :param timeframe: Timeframe - used to generate filename
         :param data: Dataframe containing OHLCV data
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: None
         """
         key = self._pair_ohlcv_key(pair, timeframe)
@@ -98,6 +100,7 @@ class HDF5DataHandler(IDataHandler):
         :param timerange: Limit data to be loaded to this timerange.
                         Optionally implemented by subclasses to avoid loading
                         all data where possible.
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: DataFrame with ohlcv data, or empty DataFrame
         """
         key = self._pair_ohlcv_key(pair, timeframe)
@@ -130,6 +133,7 @@ class HDF5DataHandler(IDataHandler):
         Remove data for this pair
         :param pair: Delete data for this pair.
         :param timeframe: Timeframe (e.g. "5m")
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: True when deleted, false if file did not exist.
         """
         filename = self._pair_data_filename(self._datadir, pair, timeframe, candle_type)
@@ -150,6 +154,7 @@ class HDF5DataHandler(IDataHandler):
         :param pair: Pair
         :param timeframe: Timeframe this ohlcv data is for
         :param data: Data to append.
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         """
         raise NotImplementedError()
 
diff --git a/freqtrade/data/history/history_utils.py b/freqtrade/data/history/history_utils.py
index cfff74d93..7b0c727c8 100644
--- a/freqtrade/data/history/history_utils.py
+++ b/freqtrade/data/history/history_utils.py
@@ -44,6 +44,7 @@ def load_pair_history(pair: str,
     :param startup_candles: Additional candles to load at the start of the period
     :param data_handler: Initialized data-handler to use.
                          Will be initialized from data_format if not set
+    :param candle_type: '', mark, index, premiumIndex, or funding_rate
     :return: DataFrame with ohlcv data, or empty DataFrame
     """
     data_handler = get_datahandler(datadir, data_format, data_handler)
@@ -79,6 +80,7 @@ def load_data(datadir: Path,
     :param startup_candles: Additional candles to load at the start of the period
     :param fail_without_data: Raise OperationalException if no data is found.
     :param data_format: Data format which should be used. Defaults to json
+    :param candle_type: '', mark, index, premiumIndex, or funding_rate
     :return: dict(<pair>:<Dataframe>)
     """
     result: Dict[str, DataFrame] = {}
@@ -120,6 +122,7 @@ def refresh_data(datadir: Path,
     :param exchange: Exchange object
     :param data_format: dataformat to use
     :param timerange: Limit data to be loaded to this timerange
+    :param candle_type: '', mark, index, premiumIndex, or funding_rate
     """
     data_handler = get_datahandler(datadir, data_format)
     for idx, pair in enumerate(pairs):
@@ -186,6 +189,7 @@ def _download_pair_history(pair: str, *,
     :param pair: pair to download
     :param timeframe: Timeframe (e.g "5m")
     :param timerange: range of time to download
+    :param candle_type: '', mark, index, premiumIndex, or funding_rate
     :return: bool with success state
     """
     data_handler = get_datahandler(datadir, data_handler=data_handler)
diff --git a/freqtrade/data/history/idatahandler.py b/freqtrade/data/history/idatahandler.py
index dba9ff4bd..d3ac0232d 100644
--- a/freqtrade/data/history/idatahandler.py
+++ b/freqtrade/data/history/idatahandler.py
@@ -46,6 +46,7 @@ class IDataHandler(ABC):
         for the specified timeframe
         :param datadir: Directory to search for ohlcv files
         :param timeframe: Timeframe to search pairs for
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: List of Pairs
         """
 
@@ -62,6 +63,7 @@ class IDataHandler(ABC):
         :param pair: Pair - used to generate filename
         :param timeframe: Timeframe - used to generate filename
         :param data: Dataframe containing OHLCV data
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: None
         """
 
@@ -79,6 +81,7 @@ class IDataHandler(ABC):
         :param timerange: Limit data to be loaded to this timerange.
                         Optionally implemented by subclasses to avoid loading
                         all data where possible.
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: DataFrame with ohlcv data, or empty DataFrame
         """
 
@@ -88,6 +91,7 @@ class IDataHandler(ABC):
         Remove data for this pair
         :param pair: Delete data for this pair.
         :param timeframe: Timeframe (e.g. "5m")
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: True when deleted, false if file did not exist.
         """
 
@@ -104,6 +108,7 @@ class IDataHandler(ABC):
         :param pair: Pair
         :param timeframe: Timeframe this ohlcv data is for
         :param data: Data to append.
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         """
 
     @abstractclassmethod
@@ -177,6 +182,7 @@ class IDataHandler(ABC):
         :param drop_incomplete: Drop last candle assuming it may be incomplete.
         :param startup_candles: Additional candles to load at the start of the period
         :param warn_no_data: Log a warning message when no data is found
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: DataFrame with ohlcv data, or empty DataFrame
         """
         # Fix startup period
diff --git a/freqtrade/data/history/jsondatahandler.py b/freqtrade/data/history/jsondatahandler.py
index 1c430f542..235b5c130 100644
--- a/freqtrade/data/history/jsondatahandler.py
+++ b/freqtrade/data/history/jsondatahandler.py
@@ -49,6 +49,7 @@ class JsonDataHandler(IDataHandler):
         for the specified timeframe
         :param datadir: Directory to search for ohlcv files
         :param timeframe: Timeframe to search pairs for
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: List of Pairs
         """
         if candle_type:
@@ -75,6 +76,7 @@ class JsonDataHandler(IDataHandler):
         :param pair: Pair - used to generate filename
         :param timeframe: Timeframe - used to generate filename
         :param data: Dataframe containing OHLCV data
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: None
         """
         filename = self._pair_data_filename(
@@ -105,6 +107,7 @@ class JsonDataHandler(IDataHandler):
         :param timerange: Limit data to be loaded to this timerange.
                         Optionally implemented by subclasses to avoid loading
                         all data where possible.
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: DataFrame with ohlcv data, or empty DataFrame
         """
         filename = self._pair_data_filename(self._datadir, pair, timeframe, candle_type=candle_type)
@@ -129,6 +132,7 @@ class JsonDataHandler(IDataHandler):
         Remove data for this pair
         :param pair: Delete data for this pair.
         :param timeframe: Timeframe (e.g. "5m")
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: True when deleted, false if file did not exist.
         """
         filename = self._pair_data_filename(self._datadir, pair, timeframe, candle_type=candle_type)
@@ -149,6 +153,7 @@ class JsonDataHandler(IDataHandler):
         :param pair: Pair
         :param timeframe: Timeframe this ohlcv data is for
         :param data: Data to append.
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         """
         raise NotImplementedError()
 
diff --git a/freqtrade/exchange/binance.py b/freqtrade/exchange/binance.py
index f82c7dca9..ad18efcf5 100644
--- a/freqtrade/exchange/binance.py
+++ b/freqtrade/exchange/binance.py
@@ -204,7 +204,7 @@ class Binance(Exchange):
         """
         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" if retrieving the mark price cnadles
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         """
         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 be503416c..91c57b788 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -1319,6 +1319,7 @@ class Exchange:
         :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
         :return: List with candle (OHLCV) data
         """
         data: List
@@ -1336,6 +1337,7 @@ class Exchange:
         :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
         :return: OHLCV DataFrame
         """
         ticks = self.get_historic_ohlcv(pair, timeframe, since_ms=since_ms, candle_type=candle_type)
@@ -1350,6 +1352,7 @@ class Exchange:
         """
         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
         """
 
         one_call = timeframe_to_msecs(timeframe) * self.ohlcv_candle_limit(timeframe)
@@ -1393,6 +1396,7 @@ class Exchange:
         :param pair_list: List of 2 element tuples containing pair, interval to refresh
         :param since_ms: time since when to download, in milliseconds
         :param cache: Assign result to _klines. Usefull for one-off downloads like for pairlists
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         :return: Dict of [{(pair, timeframe): Dataframe}]
         """
         logger.debug("Refreshing candle (OHLCV) data for %d pairs", len(pair_list))
@@ -1480,9 +1484,7 @@ class Exchange:
     ) -> Tuple[str, str, str, List]:
         """
         Asynchronously get candle history data using fetch_ohlcv
-        :param candle_type:
-            "mark" if retrieving the mark price cnadles
-            "index" for index price candles
+        :param candle_type: '', mark, index, premiumIndex, or funding_rate
         returns tuple: (pair, timeframe, ohlcv_list)
         """
         try:
diff --git a/freqtrade/strategy/informative_decorator.py b/freqtrade/strategy/informative_decorator.py
index db5a70f72..1507f09ab 100644
--- a/freqtrade/strategy/informative_decorator.py
+++ b/freqtrade/strategy/informative_decorator.py
@@ -47,6 +47,7 @@ def informative(timeframe: str, asset: str = '',
     * {column} - name of dataframe column.
     * {timeframe} - timeframe of informative dataframe.
     :param ffill: ffill dataframe after merging informative pair.
+    :param candle_type: '', mark, index, premiumIndex, or funding_rate
     """
     _asset = asset
     _timeframe = timeframe