diff --git a/freqtrade/strategy/interface.py b/freqtrade/strategy/interface.py
index 4d18e5232..9c6936c20 100644
--- a/freqtrade/strategy/interface.py
+++ b/freqtrade/strategy/interface.py
@@ -362,9 +362,9 @@ class IStrategy(ABC):
             # Don't update stoploss if trailing_only_offset_is_reached is true.
             if not (self.trailing_only_offset_is_reached and high_profit < sl_offset):
                 # Specific handling for trailing_stop_positive
-                if 'trailing_stop_positive' in self.config and high_profit > sl_offset:
+                if 'trailing_stop_positive' in self.__dict__ and high_profit > sl_offset:
                     # Ignore mypy error check in configuration that this is a float
-                    stop_loss_value = self.config.get('trailing_stop_positive')  # type: ignore
+                    stop_loss_value = self.trailing_stop_positive
                     logger.debug(f"{trade.pair} - Using positive stoploss: {stop_loss_value} "
                                  f"offset: {sl_offset:.4g} profit: {current_profit:.4f}%")