diff --git a/freqtrade/data/dataprovider.py b/freqtrade/data/dataprovider.py
index 758e401e8..c9c3e452a 100644
--- a/freqtrade/data/dataprovider.py
+++ b/freqtrade/data/dataprovider.py
@@ -40,6 +40,7 @@ class DataProvider(object):
     def ohlcv(self, pair: str, copy: bool = True) -> List[str]:
         """
         get ohlcv data for the given pair as DataFrame
+        Please check `available_pairs` to verify which pairs are currently cached.
         :param pair: pair to get the data for
         :param copy: copy dataframe before returning.
                      Use false only for RO operations (where the dataframe is not modified)