Merge branch 'develop' into stoploss_on_exchange

freqtrade/strategy/default_strategy.py

@@ -28,6 +28,13 @@ class DefaultStrategy(IStrategy):
     # Optimal ticker interval for the strategy
     ticker_interval = '5m'
 
+    # Optional order type mapping
+    order_types = {
+        'buy': 'limit',
+        'sell': 'limit',
+        'stoploss': 'limit'
+    }
+
     def populate_indicators(self, dataframe: DataFrame, metadata: dict) -> DataFrame:
         """
         Adds several different TA indicators to the given DataFrame

freqtrade/strategy/interface.py

@@ -75,6 +75,13 @@ class IStrategy(ABC):
     # associated ticker interval
     ticker_interval: str
 
+    # Optional order types
+    order_types: Dict = {
+        'buy': 'limit',
+        'sell': 'limit',
+        'stoploss': 'limit'
+    }
+
     # run "populate_indicators" only for new candle
     process_only_new_candles: bool = False
 

freqtrade/strategy/resolver.py

@@ -75,6 +75,19 @@ class StrategyResolver(object):
         else:
             config['process_only_new_candles'] = self.strategy.process_only_new_candles
 
+        if 'order_types' in config:
+            self.strategy.order_types = config['order_types']
+            logger.info(
+                "Override strategy 'order_types' with value in config file: %s.",
+                config['order_types']
+            )
+        else:
+            config['order_types'] = self.strategy.order_types
+
+        if not all(k in self.strategy.order_types for k in constants.REQUIRED_ORDERTYPES):
+            raise ImportError(f"Impossible to load Strategy '{self.strategy.__class__.__name__}'. "
+                              f"Order-types mapping is incomplete.")
+
         # Sort and apply type conversions
         self.strategy.minimal_roi = OrderedDict(sorted(
             {int(key): value for (key, value) in self.strategy.minimal_roi.items()}.items(),