Use string typehints to avoid import errors

docs/strategy-advanced.md

@@ -33,7 +33,7 @@ class Awesomestrategy(IStrategy):
         'sell': 60 * 25
     }
 
-    def check_buy_timeout(self, pair: str, trade: Trade, order: dict, **kwargs) -> bool:
+    def check_buy_timeout(self, pair: str, trade: 'Trade', order: dict, **kwargs) -> bool:
         if trade.open_rate > 100 and trade.open_date < datetime.utcnow() - timedelta(minutes=5):
             return True
         elif trade.open_rate > 10 and trade.open_date < datetime.utcnow() - timedelta(minutes=3):
@@ -43,7 +43,7 @@ class Awesomestrategy(IStrategy):
         return False
 
 
-    def check_sell_timeout(self, pair: str, trade: Trade, order: dict, **kwargs) -> bool:
+    def check_sell_timeout(self, pair: str, trade: 'Trade', order: dict, **kwargs) -> bool:
         if trade.open_rate > 100 and trade.open_date < datetime.utcnow() - timedelta(minutes=5):
             return True
         elif trade.open_rate > 10 and trade.open_date < datetime.utcnow() - timedelta(minutes=3):

freqtrade/strategy/interface.py

@@ -149,7 +149,7 @@ class IStrategy(ABC):
         :return: DataFrame with sell column
         """
 
-    def check_buy_timeout(self, pair: str, trade: Trade, order: Dict, **kwargs) -> bool:
+    def check_buy_timeout(self, pair: str, trade: Trade, order: dict, **kwargs) -> bool:
         """
         Check buy timeout function callback.
         This method can be used to override the buy-timeout.
@@ -167,7 +167,7 @@ class IStrategy(ABC):
         """
         return False
 
-    def check_sell_timeout(self, pair: str, trade: Trade, order: Dict, **kwargs) -> bool:
+    def check_sell_timeout(self, pair: str, trade: Trade, order: dict, **kwargs) -> bool:
         """
         Check sell timeout function callback.
         This method can be used to override the sell-timeout.

freqtrade/templates/subtemplates/strategy_methods_advanced.j2

@@ -1,5 +1,5 @@
 
-def check_buy_timeout(self, pair: str, trade: 'Trade', order: Dict, **kwargs) -> bool:
+def check_buy_timeout(self, pair: str, trade: 'Trade', order: dict, **kwargs) -> bool:
     """
     Check buy timeout function callback.
     This method can be used to override the buy-timeout.
@@ -19,7 +19,7 @@ def check_buy_timeout(self, pair: str, trade: 'Trade', order: Dict, **kwargs) ->
     """
     return False
 
-def check_sell_timeout(self, pair: str, trade: 'Trade', order: Dict, **kwargs) -> bool:
+def check_sell_timeout(self, pair: str, trade: 'Trade', order: dict, **kwargs) -> bool:
     """
     Check sell timeout function callback.
     This method can be used to override the sell-timeout.