Add trailing-stop to strategy

freqtrade/resolvers/strategy_resolver.py

@@ -56,6 +56,33 @@ class StrategyResolver(IResolver):
         else:
             config['stoploss'] = self.strategy.stoploss
 
+        if 'trailing_stop' in config:
+            self.strategy.trailing_stop = config['trailing_stop']
+            logger.info(
+                "Override strategy 'trailing_stop' with value in config file: %s.",
+                config['trailing_stop']
+            )
+        elif hasattr(self.strategy, "trailing_stop"):
+            config['trailing_stop'] = self.strategy.trailing_stop
+
+        if 'trailing_stop_positive' in config:
+            self.strategy.trailing_stop_positive = config['trailing_stop_positive']
+            logger.info(
+                "Override strategy 'trailing_stop_positive' with value in config file: %s.",
+                config['trailing_stop_positive']
+            )
+        elif hasattr(self.strategy, "trailing_stop_positive"):
+            config['trailing_stop_positive'] = self.strategy.trailing_stop_positive
+
+        if 'trailing_stop_positive_offset' in config:
+            self.strategy.trailing_stop_positive_offset = config['trailing_stop_positive_offset']
+            logger.info(
+                "Override strategy 'trailing_stop_positive_offset' with value in config file: %s.",
+                config['trailing_stop_positive_offset']
+            )
+        elif hasattr(self.strategy, "trailing_stop_positive_offset"):
+            config['trailing_stop_positive_offset'] = self.strategy.trailing_stop_positive_offset
+
         if 'ticker_interval' in config:
             self.strategy.ticker_interval = config['ticker_interval']
             logger.info(

freqtrade/strategy/interface.py

@@ -67,6 +67,11 @@ class IStrategy(ABC):
     # associated stoploss
     stoploss: float
 
+    # trailing stoploss
+    trailing_stop: bool = False
+    trailing_stop_positive: float
+    trailing_stop_positive_offset: float
+
     # associated ticker interval
     ticker_interval: str
 

freqtrade/tests/strategy/test_strategy.py

@@ -150,6 +150,45 @@ def test_strategy_override_stoploss(caplog):
             ) in caplog.record_tuples
 
 
+def test_strategy_override_trailing_stop(caplog):
+    caplog.set_level(logging.INFO)
+    config = {
+        'strategy': 'DefaultStrategy',
+        'trailing_stop': True
+    }
+    resolver = StrategyResolver(config)
+
+    assert resolver.strategy.trailing_stop
+    assert isinstance(resolver.strategy.trailing_stop, bool)
+    assert ('freqtrade.resolvers.strategy_resolver',
+            logging.INFO,
+            "Override strategy 'trailing_stop' with value in config file: True."
+            ) in caplog.record_tuples
+
+
+def test_strategy_override_trailing_stop_positive(caplog):
+    caplog.set_level(logging.INFO)
+    config = {
+        'strategy': 'DefaultStrategy',
+        'trailing_stop_positive': -0.1,
+        'trailing_stop_positive_offset': -0.2
+
+    }
+    resolver = StrategyResolver(config)
+
+    assert resolver.strategy.trailing_stop_positive == -0.1
+    assert ('freqtrade.resolvers.strategy_resolver',
+            logging.INFO,
+            "Override strategy 'trailing_stop_positive' with value in config file: -0.1."
+            ) in caplog.record_tuples
+
+    assert resolver.strategy.trailing_stop_positive_offset == -0.2
+    assert ('freqtrade.resolvers.strategy_resolver',
+            logging.INFO,
+            "Override strategy 'trailing_stop_positive' with value in config file: -0.1."
+            ) in caplog.record_tuples
+
+
 def test_strategy_override_ticker_interval(caplog):
     caplog.set_level(logging.INFO)