Fix none check

Author: MDUYN

investing_algorithm_framework/app/strategy.py

@@ -365,7 +365,7 @@ def get_take_profit_rule(self, symbol: str) -> Union[TakeProfitRule, None]:
               None otherwise.
         """
 
-        if self.take_profits is not None or len(self.take_profits) == 0:
+        if self.take_profits is None or len(self.take_profits) == 0:
             return None
 
         if self.take_profit_rules_lookup == {}:
@@ -386,7 +386,7 @@ def get_stop_loss_rule(self, symbol: str) -> Union[StopLossRule, None]:
               None otherwise.
         """
 
-        if self.stop_losses is not None or len(self.stop_losses) == 0:
+        if self.stop_losses is None or len(self.stop_losses) == 0:
             return None
 
         if self.stop_loss_rules_lookup == {}: