Add stoploss_value to strategy template

freqtrade/templates/subtemplates/strategy_methods_advanced.j2

@@ -12,6 +12,30 @@ def bot_loop_start(self, **kwargs) -> None:
     """
     pass
 
+custom_stoploss = True
+
+def stoploss_value(self, pair: str, trade: 'Trade', current_time: 'datetime', current_rate: float,
+                   current_profit: float, **kwargs) -> float:
+    """
+    Custom stoploss logic, returning the new distance relative to current_rate (as ratio).
+    e.g. returning -0.05 would create a stoploss 5% below current_rate.
+    The custom stoploss can never be below self.stoploss, which serves as a hard maximum loss.
+
+    For full documentation please go to https://www.freqtrade.io/en/latest/strategy-advanced/
+
+    When not implemented by a strategy, returns the initial stoploss value
+    Only called when custom_stoploss is set to True.
+
+    :param pair: Pair that's about to be sold.
+    :param trade: trade object.
+    :param current_time: datetime object, containing the current datetime
+    :param current_rate: Rate, calculated based on pricing settings in ask_strategy.
+    :param current_profit: Current profit (as ratio), calculated based on current_rate.
+    :param **kwargs: Ensure to keep this here so updates to this won't break your strategy.
+    :return float: New stoploss value, relative to the currentrate
+    """
+    return self.stoploss
+
 def confirm_trade_entry(self, pair: str, order_type: str, amount: float, rate: float,
                         time_in_force: str, **kwargs) -> bool:
     """