Allow custom_stoploss to cooperate with stoploss on exchange

freqtrade/freqtradebot.py

@@ -998,7 +998,8 @@ class FreqtradeBot(LoggingMixin):
                 logger.warning('Stoploss order was cancelled, but unable to recreate one.')
 
         # Finally we check if stoploss on exchange should be moved up because of trailing.
-        if stoploss_order and self.config.get('trailing_stop', False):
+        if stoploss_order and (self.config.get('trailing_stop', False)
+                               or self.config.get('use_custom_stoploss', False)):
             # if trailing stoploss is enabled we check if stoploss value has changed
             # in which case we cancel stoploss order and put another one with new
             # value immediately

freqtrade/resolvers/strategy_resolver.py

@@ -68,6 +68,7 @@ class StrategyResolver(IResolver):
                       ("trailing_stop_positive",          None,        None),
                       ("trailing_stop_positive_offset",   0.0,         None),
                       ("trailing_only_offset_is_reached", None,        None),
+                      ("use_custom_stoploss",             None,        None),
                       ("process_only_new_candles",        None,        None),
                       ("order_types",                     None,        None),
                       ("order_time_in_force",             None,        None),

freqtrade/rpc/api_server/api_schemas.py

@@ -123,6 +123,7 @@ class ShowConfig(BaseModel):
     trailing_stop_positive: Optional[float]
     trailing_stop_positive_offset: Optional[float]
     trailing_only_offset_is_reached: Optional[bool]
+    use_custom_stoploss: Optional[bool]
     timeframe: str
     timeframe_ms: int
     timeframe_min: int

freqtrade/rpc/rpc.py

@@ -129,6 +129,7 @@ class RPC:
             'trailing_stop_positive': config.get('trailing_stop_positive'),
             'trailing_stop_positive_offset': config.get('trailing_stop_positive_offset'),
             'trailing_only_offset_is_reached': config.get('trailing_only_offset_is_reached'),
+            'use_custom_stoploss': config.get('use_custom_stoploss'),
             'bot_name': config.get('bot_name', 'freqtrade'),
             'timeframe': config.get('timeframe'),
             'timeframe_ms': timeframe_to_msecs(config['timeframe']