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119 lines
4.7 KiB
Python
119 lines
4.7 KiB
Python
import logging
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from pathlib import Path
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from typing import Any, Dict
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import torch as th
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from freqtrade.freqai.data_kitchen import FreqaiDataKitchen
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from freqtrade.freqai.RL.Base5ActionRLEnv import Actions, Base5ActionRLEnv, Positions
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from freqtrade.freqai.RL.BaseReinforcementLearningModel import BaseReinforcementLearningModel
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logger = logging.getLogger(__name__)
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class ReinforcementLearner(BaseReinforcementLearningModel):
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"""
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User created Reinforcement Learning Model prediction model.
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"""
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def fit(self, data_dictionary: Dict[str, Any], dk: FreqaiDataKitchen, **kwargs):
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"""
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User customizable fit method
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:params:
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data_dictionary: dict = common data dictionary containing all train/test
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features/labels/weights.
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dk: FreqaiDatakitchen = data kitchen for current pair.
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:returns:
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model: Any = trained model to be used for inference in dry/live/backtesting
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"""
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train_df = data_dictionary["train_features"]
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total_timesteps = self.freqai_info["rl_config"]["train_cycles"] * len(train_df)
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policy_kwargs = dict(activation_fn=th.nn.ReLU,
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net_arch=self.net_arch)
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if dk.pair not in self.dd.model_dictionary or not self.continual_learning:
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model = self.MODELCLASS(self.policy_type, self.train_env, policy_kwargs=policy_kwargs,
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tensorboard_log=Path(
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dk.full_path / "tensorboard" / dk.pair.split('/')[0]),
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**self.freqai_info['model_training_parameters']
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)
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else:
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logger.info('Continual training activated - starting training from previously '
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'trained agent.')
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model = self.dd.model_dictionary[dk.pair]
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model.set_env(self.train_env)
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model.learn(
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total_timesteps=int(total_timesteps),
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callback=self.eval_callback
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)
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if Path(dk.data_path / "best_model.zip").is_file():
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logger.info('Callback found a best model.')
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best_model = self.MODELCLASS.load(dk.data_path / "best_model")
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return best_model
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logger.info('Couldnt find best model, using final model instead.')
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return model
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class MyRLEnv(Base5ActionRLEnv):
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"""
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User can override any function in BaseRLEnv and gym.Env. Here the user
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sets a custom reward based on profit and trade duration.
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"""
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def calculate_reward(self, action):
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"""
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An example reward function. This is the one function that users will likely
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wish to inject their own creativity into.
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:params:
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action: int = The action made by the agent for the current candle.
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:returns:
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float = the reward to give to the agent for current step (used for optimization
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of weights in NN)
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"""
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# first, penalize if the action is not valid
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if not self._is_valid(action):
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return -2
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pnl = self.get_unrealized_profit()
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factor = 100
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# reward agent for entering trades
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if (action in (Actions.Long_enter.value, Actions.Short_enter.value)
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and self._position == Positions.Neutral):
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return 25
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# discourage agent from not entering trades
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if action == Actions.Neutral.value and self._position == Positions.Neutral:
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return -1
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max_trade_duration = self.rl_config.get('max_trade_duration_candles', 300)
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trade_duration = self._current_tick - self._last_trade_tick
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if trade_duration <= max_trade_duration:
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factor *= 1.5
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elif trade_duration > max_trade_duration:
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factor *= 0.5
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# discourage sitting in position
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if (self._position in (Positions.Short, Positions.Long) and
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action == Actions.Neutral.value):
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return -1 * trade_duration / max_trade_duration
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# close long
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if action == Actions.Long_exit.value and self._position == Positions.Long:
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if pnl > self.profit_aim * self.rr:
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factor *= self.rl_config['model_reward_parameters'].get('win_reward_factor', 2)
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return float(pnl * factor)
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# close short
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if action == Actions.Short_exit.value and self._position == Positions.Short:
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if pnl > self.profit_aim * self.rr:
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factor *= self.rl_config['model_reward_parameters'].get('win_reward_factor', 2)
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return float(pnl * factor)
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return 0.
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