Update stoploss method to new functionality

freqtrade/exchange/exchange.py

@@ -1008,6 +1008,17 @@ class Exchange:
         """
         raise OperationalException(f"stoploss is not implemented for {self.name}.")
 
+    def _get_stop_order_type(self, user_order_type) -> Tuple[str, str]:
+
+        available_order_Types: Dict[str, str] = self._ft_has["stoploss_order_types"]
+        if user_order_type in available_order_Types.keys():
+            ordertype = available_order_Types[user_order_type]
+        else:
+            # Otherwise pick only one available
+            ordertype = list(available_order_Types.values())[0]
+            user_order_type = list(available_order_Types.keys())[0]
+        return ordertype, user_order_type
+
     def _get_stop_params(self, ordertype: str, stop_price: float) -> Dict:
         params = self._params.copy()
         # Verify if stopPrice works for your exchange!
@@ -1015,7 +1026,8 @@ class Exchange:
         return params
 
     @retrier(retries=0)
-    def stoploss(self, pair: str, amount: float, stop_price: float, order_types: Dict, side: str, leverage: float) -> Dict:
+    def stoploss(self, pair: str, amount: float, stop_price: float, order_types: Dict,
+                 side: str, leverage: float) -> Dict:
         """
         creates a stoploss order.
         requires `_ft_has['stoploss_order_types']` to be set as a dict mapping limit and market
@@ -1035,22 +1047,22 @@ class Exchange:
             raise OperationalException(f"stoploss is not implemented for {self.name}.")
 
         user_order_type = order_types.get('stoploss', 'market')
-        if user_order_type in self._ft_has["stoploss_order_types"].keys():
-            ordertype = self._ft_has["stoploss_order_types"][user_order_type]
-        else:
-            # Otherwise pick only one available
-            ordertype = list(self._ft_has["stoploss_order_types"].values())[0]
-            user_order_type = list(self._ft_has["stoploss_order_types"].keys())[0]
+        ordertype, user_order_type = self._get_stop_order_type(user_order_type)
 
         stop_price_norm = self.price_to_precision(pair, stop_price)
         rate = None
         if user_order_type == 'limit':
             # Limit price threshold: As limit price should always be below stop-price
             limit_price_pct = order_types.get('stoploss_on_exchange_limit_ratio', 0.99)
-            rate = stop_price * limit_price_pct
+            if side == "sell":
+                # TODO: Name limit_rate in other exchange subclasses
+                rate = stop_price * limit_price_pct
+            else:
+                rate = stop_price * (2 - limit_price_pct)
 
+            bad_stop_price = (stop_price <= rate) if side == "sell" else (stop_price >= rate)
             # Ensure rate is less than stop price
-            if stop_price_norm <= rate:
+            if bad_stop_price:
                 raise OperationalException(
                     'In stoploss limit order, stop price should be more than limit price')
             rate = self.price_to_precision(pair, rate)

freqtrade/exchange/huobi.py

@@ -22,7 +22,7 @@ class Huobi(Exchange):
         "l2_limit_range_required": False,
     }
 
-    def stoploss_adjust(self, stop_loss: float, order: Dict) -> bool:
+    def stoploss_adjust(self, stop_loss: float, order: Dict, side: str) -> bool:
         """
         Verify stop_loss against stoploss-order value (limit or price)
         Returns True if adjustment is necessary.

freqtrade/exchange/kucoin.py

@@ -27,7 +27,7 @@ class Kucoin(Exchange):
         "time_in_force_parameter": "timeInForce",
     }
 
-    def stoploss_adjust(self, stop_loss: float, order: Dict) -> bool:
+    def stoploss_adjust(self, stop_loss: float, order: Dict, side: str) -> bool:
         """
         Verify stop_loss against stoploss-order value (limit or price)
         Returns True if adjustment is necessary.

tests/exchange/test_huobi.py

@@ -110,8 +110,8 @@ def test_stoploss_adjust_huobi(mocker, default_conf):
         'price': 1500,
         'stopPrice': '1500',
     }
-    assert exchange.stoploss_adjust(1501, order)
-    assert not exchange.stoploss_adjust(1499, order)
+    assert exchange.stoploss_adjust(1501, order, 'sell')
+    assert not exchange.stoploss_adjust(1499, order, 'sell')
     # Test with invalid order case
     order['type'] = 'stop_loss'
-    assert not exchange.stoploss_adjust(1501, order)
+    assert not exchange.stoploss_adjust(1501, order, 'sell')

tests/exchange/test_kucoin.py

@@ -120,8 +120,8 @@ def test_stoploss_adjust_kucoin(mocker, default_conf):
         'stopPrice': 1500,
         'info': {'stopPrice': 1500, 'stop': "limit"},
     }
-    assert exchange.stoploss_adjust(1501, order)
-    assert not exchange.stoploss_adjust(1499, order)
+    assert exchange.stoploss_adjust(1501, order, 'sell')
+    assert not exchange.stoploss_adjust(1499, order, 'sell')
     # Test with invalid order case
     order['info']['stop'] = None
-    assert not exchange.stoploss_adjust(1501, order)
+    assert not exchange.stoploss_adjust(1501, order, 'sell')