diff --git a/freqtrade/plugins/pairlist/FullTradesFilter.py b/freqtrade/plugins/pairlist/FullTradesFilter.py
index 69779d896..9d435c3a9 100644
--- a/freqtrade/plugins/pairlist/FullTradesFilter.py
+++ b/freqtrade/plugins/pairlist/FullTradesFilter.py
@@ -48,8 +48,13 @@ class FullTradesFilter(IPairList):
         :return: new allowlist
         """
         # Get the number of open trades and max open trades config
-        num_open = Trade.get_open_trade_count()
-        max_trades = self._config['max_open_trades']
+        try:
+            num_open = Trade.get_open_trade_count()
+            max_trades = self._config['max_open_trades']
+        except AttributeError:
+            # Performancefilter does not work in backtesting.
+            self.log_once("FullTradesFilter is not available in this mode.", logger.warning)
+            return pairlist
 
         if (num_open >= max_trades) and (max_trades > 0):
             return []