diff --git a/freqtrade/optimize/backtesting.py b/freqtrade/optimize/backtesting.py
index 0c63c4c14..7c6b7cbc3 100644
--- a/freqtrade/optimize/backtesting.py
+++ b/freqtrade/optimize/backtesting.py
@@ -229,10 +229,12 @@ class Backtesting:
             # pessimistic price movement, which is moving just enough to arm stoploss and
             # immediately going down to stop price.
             if sell.sell_type == SellType.TRAILING_STOP_LOSS and trade_dur == 0:
-                if not self.strategy.use_custom_stoploss and self.strategy.trailing_stop and \
-                   self.strategy.trailing_only_offset_is_reached and \
-                   self.strategy.trailing_stop_positive_offset is not None and \
-                   self.strategy.trailing_stop_positive:
+                if (
+                    not self.strategy.use_custom_stoploss and self.strategy.trailing_stop
+                    and self.strategy.trailing_only_offset_is_reached
+                    and self.strategy.trailing_stop_positive_offset is not None
+                    and self.strategy.trailing_stop_positive
+                ):
                     # Worst case: price reaches stop_positive_offset and dives down.
                     stop_rate = (sell_row[OPEN_IDX] *
                                  (1 + abs(self.strategy.trailing_stop_positive_offset) -