diff --git a/freqtrade/strategy/default_strategy.py b/freqtrade/strategy/default_strategy.py
index 5fdbbbc90..3ac72d127 100644
--- a/freqtrade/strategy/default_strategy.py
+++ b/freqtrade/strategy/default_strategy.py
@@ -238,3 +238,17 @@ class DefaultStrategy(IStrategy):
             ),
             'sell'] = 1
         return dataframe
+
+    def did_bought(self, pair: str):
+        """
+        we are notified that a given pair was bought
+        :param pair: the pair that was is concerned by the dataframe
+        """
+        assert False is not True
+
+    def did_sold(self, pair: str):
+        """
+        we are notified that a given pair was sold
+        :param pair: the pair that was is concerned by the dataframe
+        """
+        assert False is not True
diff --git a/freqtrade/strategy/interface.py b/freqtrade/strategy/interface.py
index 9c1829680..73614f376 100644
--- a/freqtrade/strategy/interface.py
+++ b/freqtrade/strategy/interface.py
@@ -45,3 +45,17 @@ class IStrategy(ABC):
         :param pair: the pair that was is concerned by the dataframe
         :return: DataFrame with buy column
         """
+
+    @abstractmethod
+    def did_bought(self, pair: str):
+        """
+        we are notified that a given pair was bought
+        :param pair: the pair that was is concerned by the dataframe
+        """
+
+    @abstractmethod
+    def did_sold(self, pair: str):
+        """
+        we are notified that a given pair was sold
+        :param pair: the pair that was is concerned by the dataframe
+        """
diff --git a/freqtrade/strategy/strategy.py b/freqtrade/strategy/strategy.py
index 440e87825..e94320aa2 100644
--- a/freqtrade/strategy/strategy.py
+++ b/freqtrade/strategy/strategy.py
@@ -167,3 +167,17 @@ class Strategy(object):
         :return: DataFrame with buy column
         """
         return self.custom_strategy.populate_sell_trend(dataframe, pair)
+
+    def did_bought(self, pair: str):
+        """
+        we are notified that a given pair was bought
+        :param pair: the pair that was is concerned by the dataframe
+        """
+        return self.custom_strategy.did_bought(pair)
+
+    def did_sold(self, pair: str):
+        """
+        we are notified that a given pair was sold
+        :param pair: the pair that was is concerned by the dataframe
+        """
+        return self.custom_strategy.did_sold(pair)