mirror of
https://github.com/freqtrade/freqtrade.git
synced 2024-11-10 10:21:59 +00:00
435 lines
17 KiB
Python
435 lines
17 KiB
Python
# pragma pylint: disable=W0603
|
|
""" Edge positioning package """
|
|
import logging
|
|
from pathlib import Path
|
|
from typing import Any, Dict, NamedTuple
|
|
|
|
import arrow
|
|
import numpy as np
|
|
import utils_find_1st as utf1st
|
|
from pandas import DataFrame
|
|
|
|
from freqtrade import constants, OperationalException
|
|
from freqtrade.arguments import Arguments
|
|
from freqtrade.arguments import TimeRange
|
|
from freqtrade.data import history
|
|
from freqtrade.optimize import get_timeframe
|
|
from freqtrade.strategy.interface import SellType
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class PairInfo(NamedTuple):
|
|
stoploss: float
|
|
winrate: float
|
|
risk_reward_ratio: float
|
|
required_risk_reward: float
|
|
expectancy: float
|
|
nb_trades: int
|
|
avg_trade_duration: float
|
|
|
|
|
|
class Edge():
|
|
"""
|
|
Calculates Win Rate, Risk Reward Ratio, Expectancy
|
|
against historical data for a give set of markets and a strategy
|
|
it then adjusts stoploss and position size accordingly
|
|
and force it into the strategy
|
|
Author: https://github.com/mishaker
|
|
"""
|
|
|
|
config: Dict = {}
|
|
_cached_pairs: Dict[str, Any] = {} # Keeps a list of pairs
|
|
|
|
def __init__(self, config: Dict[str, Any], exchange, strategy) -> None:
|
|
|
|
self.config = config
|
|
self.exchange = exchange
|
|
self.strategy = strategy
|
|
self.ticker_interval = self.strategy.ticker_interval
|
|
self.tickerdata_to_dataframe = self.strategy.tickerdata_to_dataframe
|
|
self.get_timeframe = get_timeframe
|
|
self.advise_sell = self.strategy.advise_sell
|
|
self.advise_buy = self.strategy.advise_buy
|
|
|
|
self.edge_config = self.config.get('edge', {})
|
|
self._cached_pairs: Dict[str, Any] = {} # Keeps a list of pairs
|
|
self._final_pairs: list = []
|
|
|
|
# checking max_open_trades. it should be -1 as with Edge
|
|
# the number of trades is determined by position size
|
|
if self.config['max_open_trades'] != -1:
|
|
logger.critical('max_open_trades should be -1 in config !')
|
|
|
|
if self.config['stake_amount'] != constants.UNLIMITED_STAKE_AMOUNT:
|
|
raise OperationalException('Edge works only with unlimited stake amount')
|
|
|
|
self._capital_percentage: float = self.edge_config.get('capital_available_percentage')
|
|
self._allowed_risk: float = self.edge_config.get('allowed_risk')
|
|
self._since_number_of_days: int = self.edge_config.get('calculate_since_number_of_days', 14)
|
|
self._last_updated: int = 0 # Timestamp of pairs last updated time
|
|
self._refresh_pairs = True
|
|
|
|
self._stoploss_range_min = float(self.edge_config.get('stoploss_range_min', -0.01))
|
|
self._stoploss_range_max = float(self.edge_config.get('stoploss_range_max', -0.05))
|
|
self._stoploss_range_step = float(self.edge_config.get('stoploss_range_step', -0.001))
|
|
|
|
# calculating stoploss range
|
|
self._stoploss_range = np.arange(
|
|
self._stoploss_range_min,
|
|
self._stoploss_range_max,
|
|
self._stoploss_range_step
|
|
)
|
|
|
|
self._timerange: TimeRange = Arguments.parse_timerange("%s-" % arrow.now().shift(
|
|
days=-1 * self._since_number_of_days).format('YYYYMMDD'))
|
|
|
|
self.fee = self.exchange.get_fee()
|
|
|
|
def calculate(self) -> bool:
|
|
pairs = self.config['exchange']['pair_whitelist']
|
|
heartbeat = self.edge_config.get('process_throttle_secs')
|
|
|
|
if (self._last_updated > 0) and (
|
|
self._last_updated + heartbeat > arrow.utcnow().timestamp):
|
|
return False
|
|
|
|
data: Dict[str, Any] = {}
|
|
logger.info('Using stake_currency: %s ...', self.config['stake_currency'])
|
|
logger.info('Using local backtesting data (using whitelist in given config) ...')
|
|
|
|
data = history.load_data(
|
|
datadir=Path(self.config['datadir']) if self.config.get('datadir') else None,
|
|
pairs=pairs,
|
|
ticker_interval=self.ticker_interval,
|
|
refresh_pairs=self._refresh_pairs,
|
|
exchange=self.exchange,
|
|
timerange=self._timerange
|
|
)
|
|
|
|
if not data:
|
|
# Reinitializing cached pairs
|
|
self._cached_pairs = {}
|
|
logger.critical("No data found. Edge is stopped ...")
|
|
return False
|
|
|
|
preprocessed = self.tickerdata_to_dataframe(data)
|
|
|
|
# Print timeframe
|
|
min_date, max_date = self.get_timeframe(preprocessed)
|
|
logger.info(
|
|
'Measuring data from %s up to %s (%s days) ...',
|
|
min_date.isoformat(),
|
|
max_date.isoformat(),
|
|
(max_date - min_date).days
|
|
)
|
|
headers = ['date', 'buy', 'open', 'close', 'sell', 'high', 'low']
|
|
|
|
trades: list = []
|
|
for pair, pair_data in preprocessed.items():
|
|
# Sorting dataframe by date and reset index
|
|
pair_data = pair_data.sort_values(by=['date'])
|
|
pair_data = pair_data.reset_index(drop=True)
|
|
|
|
ticker_data = self.advise_sell(
|
|
self.advise_buy(pair_data, {'pair': pair}), {'pair': pair})[headers].copy()
|
|
|
|
trades += self._find_trades_for_stoploss_range(ticker_data, pair, self._stoploss_range)
|
|
|
|
# If no trade found then exit
|
|
if len(trades) == 0:
|
|
return False
|
|
|
|
# Fill missing, calculable columns, profit, duration , abs etc.
|
|
trades_df = self._fill_calculable_fields(DataFrame(trades))
|
|
self._cached_pairs = self._process_expectancy(trades_df)
|
|
self._last_updated = arrow.utcnow().timestamp
|
|
|
|
return True
|
|
|
|
def stake_amount(self, pair: str, free_capital: float,
|
|
total_capital: float, capital_in_trade: float) -> float:
|
|
stoploss = self.stoploss(pair)
|
|
available_capital = (total_capital + capital_in_trade) * self._capital_percentage
|
|
allowed_capital_at_risk = available_capital * self._allowed_risk
|
|
max_position_size = abs(allowed_capital_at_risk / stoploss)
|
|
position_size = min(max_position_size, free_capital)
|
|
if pair in self._cached_pairs:
|
|
logger.info(
|
|
'winrate: %s, expectancy: %s, position size: %s, pair: %s,'
|
|
' capital in trade: %s, free capital: %s, total capital: %s,'
|
|
' stoploss: %s, available capital: %s.',
|
|
self._cached_pairs[pair].winrate,
|
|
self._cached_pairs[pair].expectancy,
|
|
position_size, pair,
|
|
capital_in_trade, free_capital, total_capital,
|
|
stoploss, available_capital
|
|
)
|
|
return round(position_size, 15)
|
|
|
|
def stoploss(self, pair: str) -> float:
|
|
if pair in self._cached_pairs:
|
|
return self._cached_pairs[pair].stoploss
|
|
else:
|
|
logger.warning('tried to access stoploss of a non-existing pair, '
|
|
'strategy stoploss is returned instead.')
|
|
return self.strategy.stoploss
|
|
|
|
def adjust(self, pairs) -> list:
|
|
"""
|
|
Filters out and sorts "pairs" according to Edge calculated pairs
|
|
"""
|
|
final = []
|
|
for pair, info in self._cached_pairs.items():
|
|
if info.expectancy > float(self.edge_config.get('minimum_expectancy', 0.2)) and \
|
|
info.winrate > float(self.edge_config.get('minimum_winrate', 0.60)) and \
|
|
pair in pairs:
|
|
final.append(pair)
|
|
|
|
if self._final_pairs != final:
|
|
self._final_pairs = final
|
|
if self._final_pairs:
|
|
logger.info('Edge validated only %s', self._final_pairs)
|
|
else:
|
|
logger.info('Edge removed all pairs as no pair with minimum expectancy was found !')
|
|
|
|
return self._final_pairs
|
|
|
|
def _fill_calculable_fields(self, result: DataFrame) -> DataFrame:
|
|
"""
|
|
The result frame contains a number of columns that are calculable
|
|
from other columns. These are left blank till all rows are added,
|
|
to be populated in single vector calls.
|
|
|
|
Columns to be populated are:
|
|
- Profit
|
|
- trade duration
|
|
- profit abs
|
|
:param result Dataframe
|
|
:return: result Dataframe
|
|
"""
|
|
|
|
# stake and fees
|
|
# stake = 0.015
|
|
# 0.05% is 0.0005
|
|
# fee = 0.001
|
|
|
|
# we set stake amount to an arbitrary amount.
|
|
# as it doesn't change the calculation.
|
|
# all returned values are relative. they are percentages.
|
|
stake = 0.015
|
|
fee = self.fee
|
|
open_fee = fee / 2
|
|
close_fee = fee / 2
|
|
|
|
result['trade_duration'] = result['close_time'] - result['open_time']
|
|
|
|
result['trade_duration'] = result['trade_duration'].map(
|
|
lambda x: int(x.total_seconds() / 60))
|
|
|
|
# Spends, Takes, Profit, Absolute Profit
|
|
|
|
# Buy Price
|
|
result['buy_vol'] = stake / result['open_rate'] # How many target are we buying
|
|
result['buy_fee'] = stake * open_fee
|
|
result['buy_spend'] = stake + result['buy_fee'] # How much we're spending
|
|
|
|
# Sell price
|
|
result['sell_sum'] = result['buy_vol'] * result['close_rate']
|
|
result['sell_fee'] = result['sell_sum'] * close_fee
|
|
result['sell_take'] = result['sell_sum'] - result['sell_fee']
|
|
|
|
# profit_percent
|
|
result['profit_percent'] = (result['sell_take'] - result['buy_spend']) / result['buy_spend']
|
|
|
|
# Absolute profit
|
|
result['profit_abs'] = result['sell_take'] - result['buy_spend']
|
|
|
|
return result
|
|
|
|
def _process_expectancy(self, results: DataFrame) -> Dict[str, Any]:
|
|
"""
|
|
This calculates WinRate, Required Risk Reward, Risk Reward and Expectancy of all pairs
|
|
The calulation will be done per pair and per strategy.
|
|
"""
|
|
# Removing pairs having less than min_trades_number
|
|
min_trades_number = self.edge_config.get('min_trade_number', 10)
|
|
results = results.groupby(['pair', 'stoploss']).filter(lambda x: len(x) > min_trades_number)
|
|
###################################
|
|
|
|
# Removing outliers (Only Pumps) from the dataset
|
|
# The method to detect outliers is to calculate standard deviation
|
|
# Then every value more than (standard deviation + 2*average) is out (pump)
|
|
#
|
|
# Removing Pumps
|
|
if self.edge_config.get('remove_pumps', False):
|
|
results = results.groupby(['pair', 'stoploss']).apply(
|
|
lambda x: x[x['profit_abs'] < 2 * x['profit_abs'].std() + x['profit_abs'].mean()])
|
|
##########################################################################
|
|
|
|
# Removing trades having a duration more than X minutes (set in config)
|
|
max_trade_duration = self.edge_config.get('max_trade_duration_minute', 1440)
|
|
results = results[results.trade_duration < max_trade_duration]
|
|
#######################################################################
|
|
|
|
if results.empty:
|
|
return {}
|
|
|
|
groupby_aggregator = {
|
|
'profit_abs': [
|
|
('nb_trades', 'count'), # number of all trades
|
|
('profit_sum', lambda x: x[x > 0].sum()), # cumulative profit of all winning trades
|
|
('loss_sum', lambda x: abs(x[x < 0].sum())), # cumulative loss of all losing trades
|
|
('nb_win_trades', lambda x: x[x > 0].count()) # number of winning trades
|
|
],
|
|
'trade_duration': [('avg_trade_duration', 'mean')]
|
|
}
|
|
|
|
# Group by (pair and stoploss) by applying above aggregator
|
|
df = results.groupby(['pair', 'stoploss'])['profit_abs', 'trade_duration'].agg(
|
|
groupby_aggregator).reset_index(col_level=1)
|
|
|
|
# Dropping level 0 as we don't need it
|
|
df.columns = df.columns.droplevel(0)
|
|
|
|
# Calculating number of losing trades, average win and average loss
|
|
df['nb_loss_trades'] = df['nb_trades'] - df['nb_win_trades']
|
|
df['average_win'] = df['profit_sum'] / df['nb_win_trades']
|
|
df['average_loss'] = df['loss_sum'] / df['nb_loss_trades']
|
|
|
|
# Win rate = number of profitable trades / number of trades
|
|
df['winrate'] = df['nb_win_trades'] / df['nb_trades']
|
|
|
|
# risk_reward_ratio = average win / average loss
|
|
df['risk_reward_ratio'] = df['average_win'] / df['average_loss']
|
|
|
|
# required_risk_reward = (1 / winrate) - 1
|
|
df['required_risk_reward'] = (1 / df['winrate']) - 1
|
|
|
|
# expectancy = (risk_reward_ratio * winrate) - (lossrate)
|
|
df['expectancy'] = (df['risk_reward_ratio'] * df['winrate']) - (1 - df['winrate'])
|
|
|
|
# sort by expectancy and stoploss
|
|
df = df.sort_values(by=['expectancy', 'stoploss'], ascending=False).groupby(
|
|
'pair').first().sort_values(by=['expectancy'], ascending=False).reset_index()
|
|
|
|
final = {}
|
|
for x in df.itertuples():
|
|
final[x.pair] = PairInfo(
|
|
x.stoploss,
|
|
x.winrate,
|
|
x.risk_reward_ratio,
|
|
x.required_risk_reward,
|
|
x.expectancy,
|
|
x.nb_trades,
|
|
x.avg_trade_duration
|
|
)
|
|
|
|
# Returning a list of pairs in order of "expectancy"
|
|
return final
|
|
|
|
def _find_trades_for_stoploss_range(self, ticker_data, pair, stoploss_range):
|
|
buy_column = ticker_data['buy'].values
|
|
sell_column = ticker_data['sell'].values
|
|
date_column = ticker_data['date'].values
|
|
ohlc_columns = ticker_data[['open', 'high', 'low', 'close']].values
|
|
|
|
result: list = []
|
|
for stoploss in stoploss_range:
|
|
result += self._detect_next_stop_or_sell_point(
|
|
buy_column, sell_column, date_column, ohlc_columns, round(stoploss, 6), pair
|
|
)
|
|
|
|
return result
|
|
|
|
def _detect_next_stop_or_sell_point(self, buy_column, sell_column, date_column,
|
|
ohlc_columns, stoploss, pair, start_point=0):
|
|
"""
|
|
Iterate through ohlc_columns recursively in order to find the next trade
|
|
Next trade opens from the first buy signal noticed to
|
|
The sell or stoploss signal after it.
|
|
It then calls itself cutting OHLC, buy_column, sell_colum and date_column
|
|
Cut from (the exit trade index) + 1
|
|
Author: https://github.com/mishaker
|
|
"""
|
|
|
|
result: list = []
|
|
open_trade_index = utf1st.find_1st(buy_column, 1, utf1st.cmp_equal)
|
|
|
|
# return empty if we don't find trade entry (i.e. buy==1) or
|
|
# we find a buy but at the of array
|
|
if open_trade_index == -1 or open_trade_index == len(buy_column) - 1:
|
|
return []
|
|
else:
|
|
open_trade_index += 1 # when a buy signal is seen,
|
|
# trade opens in reality on the next candle
|
|
|
|
stop_price_percentage = stoploss + 1
|
|
open_price = ohlc_columns[open_trade_index, 0]
|
|
stop_price = (open_price * stop_price_percentage)
|
|
|
|
# Searching for the index where stoploss is hit
|
|
stop_index = utf1st.find_1st(
|
|
ohlc_columns[open_trade_index:, 2], stop_price, utf1st.cmp_smaller)
|
|
|
|
# If we don't find it then we assume stop_index will be far in future (infinite number)
|
|
if stop_index == -1:
|
|
stop_index = float('inf')
|
|
|
|
# Searching for the index where sell is hit
|
|
sell_index = utf1st.find_1st(sell_column[open_trade_index:], 1, utf1st.cmp_equal)
|
|
|
|
# If we don't find it then we assume sell_index will be far in future (infinite number)
|
|
if sell_index == -1:
|
|
sell_index = float('inf')
|
|
|
|
# Check if we don't find any stop or sell point (in that case trade remains open)
|
|
# It is not interesting for Edge to consider it so we simply ignore the trade
|
|
# And stop iterating there is no more entry
|
|
if stop_index == sell_index == float('inf'):
|
|
return []
|
|
|
|
if stop_index <= sell_index:
|
|
exit_index = open_trade_index + stop_index
|
|
exit_type = SellType.STOP_LOSS
|
|
exit_price = stop_price
|
|
elif stop_index > sell_index:
|
|
# if exit is SELL then we exit at the next candle
|
|
exit_index = open_trade_index + sell_index + 1
|
|
|
|
# check if we have the next candle
|
|
if len(ohlc_columns) - 1 < exit_index:
|
|
return []
|
|
|
|
exit_type = SellType.SELL_SIGNAL
|
|
exit_price = ohlc_columns[exit_index, 0]
|
|
|
|
trade = {'pair': pair,
|
|
'stoploss': stoploss,
|
|
'profit_percent': '',
|
|
'profit_abs': '',
|
|
'open_time': date_column[open_trade_index],
|
|
'close_time': date_column[exit_index],
|
|
'open_index': start_point + open_trade_index,
|
|
'close_index': start_point + exit_index,
|
|
'trade_duration': '',
|
|
'open_rate': round(open_price, 15),
|
|
'close_rate': round(exit_price, 15),
|
|
'exit_type': exit_type
|
|
}
|
|
|
|
result.append(trade)
|
|
|
|
# Calling again the same function recursively but giving
|
|
# it a view of exit_index till the end of array
|
|
return result + self._detect_next_stop_or_sell_point(
|
|
buy_column[exit_index:],
|
|
sell_column[exit_index:],
|
|
date_column[exit_index:],
|
|
ohlc_columns[exit_index:],
|
|
stoploss,
|
|
pair,
|
|
(start_point + exit_index)
|
|
)
|