Add missing methods to advanced strategy template

freqtrade/strategy/interface.py

@@ -288,10 +288,10 @@ class IStrategy(ABC, HyperStrategyMixin):
         time. This method is not called when sell signal is set.
 
         This method should be overridden to create sell signals that depend on trade parameters. For
-        example you could implement a stoploss relative to candle when trade was opened, or a custom
+        example you could implement a sell relative to the candle when the trade was opened,
-        1:2 risk-reward ROI.
+        or a custom 1:2 risk-reward ROI.
 
-        Custom sell reason max length is 64. Exceeding this limit will raise OperationalException.
+        Custom sell reason max length is 64. Exceeding characters will be removed.
 
         :param pair: Pair that's currently analyzed
         :param trade: trade object.

freqtrade/templates/subtemplates/strategy_methods_advanced.j2

@@ -12,6 +12,23 @@ def bot_loop_start(self, **kwargs) -> None:
     """
     pass
 
+def custom_stake_amount(self, pair: str, current_time: 'datetime', current_rate: float,
+                        proposed_stake: float, min_stake: float, max_stake: float,
+                        **kwargs) -> float:
+    """
+    Customize stake size for each new trade. This method is not called when edge module is
+    enabled.
+
+    :param pair: Pair that's currently analyzed
+    :param current_time: datetime object, containing the current datetime
+    :param current_rate: Rate, calculated based on pricing settings in ask_strategy.
+    :param proposed_stake: A stake amount proposed by the bot.
+    :param min_stake: Minimal stake size allowed by exchange.
+    :param max_stake: Balance available for trading.
+    :return: A stake size, which is between min_stake and max_stake.
+    """
+    return proposed_stake
+
 use_custom_stoploss = True
 
 def custom_stoploss(self, pair: str, trade: 'Trade', current_time: 'datetime',
@@ -38,6 +55,30 @@ def custom_stoploss(self, pair: str, trade: 'Trade', current_time: 'datetime',
     """
     return self.stoploss
 
+def custom_sell(self, pair: str, trade: 'Trade', current_time: 'datetime', current_rate: float,
+                current_profit: float, **kwargs) -> 'Optional[Union[str, bool]]':
+    """
+    Custom sell signal logic indicating that specified position should be sold. Returning a
+    string or True from this method is equal to setting sell signal on a candle at specified
+    time. This method is not called when sell signal is set.
+
+    This method should be overridden to create sell signals that depend on trade parameters. For
+    example you could implement a sell relative to the candle when the trade was opened,
+    or a custom 1:2 risk-reward ROI.
+
+    Custom sell reason max length is 64. Exceeding characters will be removed.
+
+    :param pair: Pair that's currently analyzed
+    :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: To execute sell, return a string with custom sell reason or True. Otherwise return
+    None or False.
+    """
+    return None
+
 def confirm_trade_entry(self, pair: str, order_type: str, amount: float, rate: float,
                         time_in_force: str, current_time: 'datetime', **kwargs) -> bool:
     """