diff --git a/freqtrade/data/btanalysis.py b/freqtrade/data/btanalysis.py
index 17b243f56..898072748 100644
--- a/freqtrade/data/btanalysis.py
+++ b/freqtrade/data/btanalysis.py
@@ -129,7 +129,7 @@ def load_trades_from_db(db_url: str) -> pd.DataFrame:
     return trades
 
 
-def load_trades(source: str, db_url: str, exportfilename: Path, no_trades: bool) -> pd.DataFrame:
+def load_trades(source: str, db_url: str, exportfilename: Path, no_trades: bool = False) -> pd.DataFrame:
     """
     Based on configuration option "trade_source":
     * loads data from DB (using `db_url`)