mirror of
https://github.com/freqtrade/freqtrade.git
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617 lines
18 KiB
Python
617 lines
18 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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# QTPyLib: Quantitative Trading Python Library
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# https://github.com/ranaroussi/qtpylib
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#
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# Copyright 2016 Ran Aroussi
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#
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# Licensed under the GNU Lesser General Public License, v3.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.gnu.org/licenses/lgpl-3.0.en.html
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import sys
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import warnings
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from datetime import datetime, timedelta
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import numpy as np
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import pandas as pd
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from pandas.core.base import PandasObject
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# =============================================
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# check min, python version
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if sys.version_info < (3, 4):
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raise SystemError("QTPyLib requires Python version >= 3.4")
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# =============================================
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warnings.simplefilter(action="ignore", category=RuntimeWarning)
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# =============================================
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def numpy_rolling_window(data, window):
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shape = data.shape[:-1] + (data.shape[-1] - window + 1, window)
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strides = data.strides + (data.strides[-1],)
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return np.lib.stride_tricks.as_strided(data, shape=shape, strides=strides)
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def numpy_rolling_series(func):
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def func_wrapper(data, window, as_source=False):
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series = data.values if isinstance(data, pd.Series) else data
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new_series = np.empty(len(series)) * np.nan
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calculated = func(series, window)
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new_series[-len(calculated):] = calculated
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if as_source and isinstance(data, pd.Series):
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return pd.Series(index=data.index, data=new_series)
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return new_series
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return func_wrapper
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@numpy_rolling_series
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def numpy_rolling_mean(data, window, as_source=False):
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return np.mean(numpy_rolling_window(data, window), -1)
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@numpy_rolling_series
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def numpy_rolling_std(data, window, as_source=False):
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return np.std(numpy_rolling_window(data, window), -1)
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# ---------------------------------------------
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def session(df, start='17:00', end='16:00'):
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""" remove previous globex day from df """
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if len(df) == 0:
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return df
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# get start/end/now as decimals
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int_start = list(map(int, start.split(':')))
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int_start = (int_start[0] + int_start[1] - 1 / 100) - 0.0001
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int_end = list(map(int, end.split(':')))
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int_end = int_end[0] + int_end[1] / 100
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int_now = (df[-1:].index.hour[0] + (df[:1].index.minute[0]) / 100)
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# same-dat session?
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is_same_day = int_end > int_start
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# set pointers
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curr = prev = df[-1:].index[0].strftime('%Y-%m-%d')
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# globex/forex session
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if not is_same_day:
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prev = (datetime.strptime(curr, '%Y-%m-%d') -
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timedelta(1)).strftime('%Y-%m-%d')
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# slice
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if int_now >= int_start:
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df = df[df.index >= curr + ' ' + start]
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else:
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df = df[df.index >= prev + ' ' + start]
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return df.copy()
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# ---------------------------------------------
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def heikinashi(bars):
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bars = bars.copy()
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bars['ha_close'] = (bars['open'] + bars['high'] +
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bars['low'] + bars['close']) / 4
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bars['ha_open'] = (bars['open'].shift(1) + bars['close'].shift(1)) / 2
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bars.loc[:1, 'ha_open'] = bars['open'].values[0]
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for x in range(2):
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bars.loc[1:, 'ha_open'] = (
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(bars['ha_open'].shift(1) + bars['ha_close'].shift(1)) / 2)[1:]
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bars['ha_high'] = bars.loc[:, ['high', 'ha_open', 'ha_close']].max(axis=1)
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bars['ha_low'] = bars.loc[:, ['low', 'ha_open', 'ha_close']].min(axis=1)
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return pd.DataFrame(
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index=bars.index,
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data={
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'open': bars['ha_open'],
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'high': bars['ha_high'],
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'low': bars['ha_low'],
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'close': bars['ha_close']})
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# ---------------------------------------------
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def tdi(series, rsi_len=13, bollinger_len=34, rsi_smoothing=2,
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rsi_signal_len=7, bollinger_std=1.6185):
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rsi_series = rsi(series, rsi_len)
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bb_series = bollinger_bands(rsi_series, bollinger_len, bollinger_std)
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signal = sma(rsi_series, rsi_signal_len)
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rsi_series = sma(rsi_series, rsi_smoothing)
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return pd.DataFrame(index=series.index, data={
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"rsi": rsi_series,
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"signal": signal,
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"bbupper": bb_series['upper'],
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"bblower": bb_series['lower'],
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"bbmid": bb_series['mid']
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})
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# ---------------------------------------------
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def awesome_oscillator(df, weighted=False, fast=5, slow=34):
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midprice = (df['high'] + df['low']) / 2
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if weighted:
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ao = (midprice.ewm(fast).mean() - midprice.ewm(slow).mean()).values
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else:
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ao = numpy_rolling_mean(midprice, fast) - \
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numpy_rolling_mean(midprice, slow)
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return pd.Series(index=df.index, data=ao)
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# ---------------------------------------------
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def nans(len=1):
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mtx = np.empty(len)
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mtx[:] = np.nan
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return mtx
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# ---------------------------------------------
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def typical_price(bars):
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res = (bars['high'] + bars['low'] + bars['close']) / 3.
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return pd.Series(index=bars.index, data=res)
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# ---------------------------------------------
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def mid_price(bars):
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res = (bars['high'] + bars['low']) / 2.
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return pd.Series(index=bars.index, data=res)
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# ---------------------------------------------
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def ibs(bars):
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""" Internal bar strength """
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res = np.round((bars['close'] - bars['low']) /
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(bars['high'] - bars['low']), 2)
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return pd.Series(index=bars.index, data=res)
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# ---------------------------------------------
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def true_range(bars):
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return pd.DataFrame({
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"hl": bars['high'] - bars['low'],
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"hc": abs(bars['high'] - bars['close'].shift(1)),
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"lc": abs(bars['low'] - bars['close'].shift(1))
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}).max(axis=1)
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# ---------------------------------------------
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def atr(bars, window=14, exp=False):
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tr = true_range(bars)
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if exp:
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res = rolling_weighted_mean(tr, window)
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else:
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res = rolling_mean(tr, window)
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res = pd.Series(res)
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return (res.shift(1) * (window - 1) + res) / window
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# ---------------------------------------------
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def crossed(series1, series2, direction=None):
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if isinstance(series1, np.ndarray):
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series1 = pd.Series(series1)
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if isinstance(series2, int) or isinstance(series2, float) or isinstance(series2, np.ndarray):
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series2 = pd.Series(index=series1.index, data=series2)
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if direction is None or direction == "above":
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above = pd.Series((series1 > series2) & (
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series1.shift(1) <= series2.shift(1)))
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if direction is None or direction == "below":
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below = pd.Series((series1 < series2) & (
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series1.shift(1) >= series2.shift(1)))
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if direction is None:
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return above or below
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return above if direction == "above" else below
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def crossed_above(series1, series2):
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return crossed(series1, series2, "above")
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def crossed_below(series1, series2):
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return crossed(series1, series2, "below")
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# ---------------------------------------------
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def rolling_std(series, window=200, min_periods=None):
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min_periods = window if min_periods is None else min_periods
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if min_periods == window and len(series) > window:
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return numpy_rolling_std(series, window, True)
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else:
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try:
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return series.rolling(window=window, min_periods=min_periods).std()
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except BaseException:
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return pd.Series(series).rolling(window=window, min_periods=min_periods).std()
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# ---------------------------------------------
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def rolling_mean(series, window=200, min_periods=None):
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min_periods = window if min_periods is None else min_periods
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if min_periods == window and len(series) > window:
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return numpy_rolling_mean(series, window, True)
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else:
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try:
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return series.rolling(window=window, min_periods=min_periods).mean()
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except BaseException:
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return pd.Series(series).rolling(window=window, min_periods=min_periods).mean()
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# ---------------------------------------------
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def rolling_min(series, window=14, min_periods=None):
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min_periods = window if min_periods is None else min_periods
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try:
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return series.rolling(window=window, min_periods=min_periods).min()
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except BaseException:
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return pd.Series(series).rolling(window=window, min_periods=min_periods).min()
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# ---------------------------------------------
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def rolling_max(series, window=14, min_periods=None):
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min_periods = window if min_periods is None else min_periods
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try:
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return series.rolling(window=window, min_periods=min_periods).min()
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except BaseException:
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return pd.Series(series).rolling(window=window, min_periods=min_periods).min()
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# ---------------------------------------------
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def rolling_weighted_mean(series, window=200, min_periods=None):
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min_periods = window if min_periods is None else min_periods
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try:
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return series.ewm(span=window, min_periods=min_periods).mean()
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except BaseException:
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return pd.ewma(series, span=window, min_periods=min_periods)
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# ---------------------------------------------
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def hull_moving_average(series, window=200):
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wma = (2 * rolling_weighted_mean(series, window=window / 2)) - \
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rolling_weighted_mean(series, window=window)
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return rolling_weighted_mean(wma, window=np.sqrt(window))
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# ---------------------------------------------
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def sma(series, window=200, min_periods=None):
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return rolling_mean(series, window=window, min_periods=min_periods)
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# ---------------------------------------------
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def wma(series, window=200, min_periods=None):
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return rolling_weighted_mean(series, window=window, min_periods=min_periods)
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# ---------------------------------------------
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def hma(series, window=200):
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return hull_moving_average(series, window=window)
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# ---------------------------------------------
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def vwap(bars):
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"""
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calculate vwap of entire time series
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(input can be pandas series or numpy array)
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bars are usually mid [ (h+l)/2 ] or typical [ (h+l+c)/3 ]
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"""
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typical = ((bars['high'] + bars['low'] + bars['close']) / 3).values
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volume = bars['volume'].values
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return pd.Series(index=bars.index,
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data=np.cumsum(volume * typical) / np.cumsum(volume))
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# ---------------------------------------------
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def rolling_vwap(bars, window=200, min_periods=None):
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"""
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calculate vwap using moving window
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(input can be pandas series or numpy array)
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bars are usually mid [ (h+l)/2 ] or typical [ (h+l+c)/3 ]
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"""
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min_periods = window if min_periods is None else min_periods
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typical = ((bars['high'] + bars['low'] + bars['close']) / 3)
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volume = bars['volume']
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left = (volume * typical).rolling(window=window,
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min_periods=min_periods).sum()
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right = volume.rolling(window=window, min_periods=min_periods).sum()
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return pd.Series(index=bars.index, data=(left / right))
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# ---------------------------------------------
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def rsi(series, window=14):
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"""
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compute the n period relative strength indicator
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"""
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# 100-(100/relative_strength)
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deltas = np.diff(series)
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seed = deltas[:window + 1]
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# default values
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ups = seed[seed > 0].sum() / window
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downs = -seed[seed < 0].sum() / window
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rsival = np.zeros_like(series)
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rsival[:window] = 100. - 100. / (1. + ups / downs)
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# period values
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for i in range(window, len(series)):
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delta = deltas[i - 1]
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if delta > 0:
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upval = delta
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downval = 0
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else:
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upval = 0
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downval = -delta
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ups = (ups * (window - 1) + upval) / window
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downs = (downs * (window - 1.) + downval) / window
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rsival[i] = 100. - 100. / (1. + ups / downs)
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# return rsival
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return pd.Series(index=series.index, data=rsival)
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# ---------------------------------------------
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def macd(series, fast=3, slow=10, smooth=16):
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"""
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compute the MACD (Moving Average Convergence/Divergence)
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using a fast and slow exponential moving avg'
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return value is emaslow, emafast, macd which are len(x) arrays
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"""
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macd = rolling_weighted_mean(series, window=fast) - \
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rolling_weighted_mean(series, window=slow)
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signal = rolling_weighted_mean(macd, window=smooth)
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histogram = macd - signal
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# return macd, signal, histogram
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return pd.DataFrame(index=series.index, data={
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'macd': macd.values,
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'signal': signal.values,
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'histogram': histogram.values
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})
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# ---------------------------------------------
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def bollinger_bands(series, window=20, stds=2):
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sma = rolling_mean(series, window=window)
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std = rolling_std(series, window=window)
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upper = sma + std * stds
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lower = sma - std * stds
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return pd.DataFrame(index=series.index, data={
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'upper': upper,
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'mid': sma,
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'lower': lower
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})
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# ---------------------------------------------
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def weighted_bollinger_bands(series, window=20, stds=2):
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ema = rolling_weighted_mean(series, window=window)
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std = rolling_std(series, window=window)
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upper = ema + std * stds
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lower = ema - std * stds
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return pd.DataFrame(index=series.index, data={
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'upper': upper.values,
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'mid': ema.values,
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'lower': lower.values
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})
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# ---------------------------------------------
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def returns(series):
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try:
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res = (series / series.shift(1) -
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1).replace([np.inf, -np.inf], float('NaN'))
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except BaseException:
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res = nans(len(series))
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return pd.Series(index=series.index, data=res)
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# ---------------------------------------------
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def log_returns(series):
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try:
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res = np.log(series / series.shift(1)
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).replace([np.inf, -np.inf], float('NaN'))
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except BaseException:
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res = nans(len(series))
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return pd.Series(index=series.index, data=res)
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# ---------------------------------------------
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def implied_volatility(series, window=252):
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try:
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logret = np.log(series / series.shift(1)
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).replace([np.inf, -np.inf], float('NaN'))
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res = numpy_rolling_std(logret, window) * np.sqrt(window)
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except BaseException:
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res = nans(len(series))
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return pd.Series(index=series.index, data=res)
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# ---------------------------------------------
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def keltner_channel(bars, window=14, atrs=2):
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typical_mean = rolling_mean(typical_price(bars), window)
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atrval = atr(bars, window) * atrs
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upper = typical_mean + atrval
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lower = typical_mean - atrval
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return pd.DataFrame(index=bars.index, data={
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'upper': upper.values,
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'mid': typical_mean.values,
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'lower': lower.values
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})
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# ---------------------------------------------
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def roc(series, window=14):
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"""
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compute rate of change
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"""
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res = (series - series.shift(window)) / series.shift(window)
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return pd.Series(index=series.index, data=res)
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# ---------------------------------------------
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def cci(series, window=14):
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"""
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compute commodity channel index
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"""
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price = typical_price(series)
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typical_mean = rolling_mean(price, window)
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res = (price - typical_mean) / (.015 * np.std(typical_mean))
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return pd.Series(index=series.index, data=res)
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# ---------------------------------------------
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def stoch(df, window=14, d=3, k=3, fast=False):
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"""
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compute the n period relative strength indicator
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http://excelta.blogspot.co.il/2013/09/stochastic-oscillator-technical.html
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"""
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highs_ma = pd.concat([df['high'].shift(i)
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for i in np.arange(window)], 1).apply(list, 1)
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highs_ma = highs_ma.T.max().T
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lows_ma = pd.concat([df['low'].shift(i)
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for i in np.arange(window)], 1).apply(list, 1)
|
|
lows_ma = lows_ma.T.min().T
|
|
|
|
fast_k = ((df['close'] - lows_ma) / (highs_ma - lows_ma)) * 100
|
|
fast_d = numpy_rolling_mean(fast_k, d)
|
|
|
|
if fast:
|
|
data = {
|
|
'k': fast_k,
|
|
'd': fast_d
|
|
}
|
|
|
|
else:
|
|
slow_k = numpy_rolling_mean(fast_k, k)
|
|
slow_d = numpy_rolling_mean(slow_k, d)
|
|
data = {
|
|
'k': slow_k,
|
|
'd': slow_d
|
|
}
|
|
|
|
return pd.DataFrame(index=df.index, data=data)
|
|
|
|
# ---------------------------------------------
|
|
|
|
|
|
def zscore(bars, window=20, stds=1, col='close'):
|
|
""" get zscore of price """
|
|
std = numpy_rolling_std(bars[col], window)
|
|
mean = numpy_rolling_mean(bars[col], window)
|
|
return (bars[col] - mean) / (std * stds)
|
|
|
|
# ---------------------------------------------
|
|
|
|
|
|
def pvt(bars):
|
|
""" Price Volume Trend """
|
|
pvt = ((bars['close'] - bars['close'].shift(1)) /
|
|
bars['close'].shift(1)) * bars['volume']
|
|
return pvt.cumsum()
|
|
|
|
|
|
# =============================================
|
|
|
|
PandasObject.session = session
|
|
PandasObject.atr = atr
|
|
PandasObject.bollinger_bands = bollinger_bands
|
|
PandasObject.cci = cci
|
|
PandasObject.crossed = crossed
|
|
PandasObject.crossed_above = crossed_above
|
|
PandasObject.crossed_below = crossed_below
|
|
PandasObject.heikinashi = heikinashi
|
|
PandasObject.hull_moving_average = hull_moving_average
|
|
PandasObject.ibs = ibs
|
|
PandasObject.implied_volatility = implied_volatility
|
|
PandasObject.keltner_channel = keltner_channel
|
|
PandasObject.log_returns = log_returns
|
|
PandasObject.macd = macd
|
|
PandasObject.returns = returns
|
|
PandasObject.roc = roc
|
|
PandasObject.rolling_max = rolling_max
|
|
PandasObject.rolling_min = rolling_min
|
|
PandasObject.rolling_mean = rolling_mean
|
|
PandasObject.rolling_std = rolling_std
|
|
PandasObject.rsi = rsi
|
|
PandasObject.stoch = stoch
|
|
PandasObject.zscore = zscore
|
|
PandasObject.pvt = pvt
|
|
PandasObject.tdi = tdi
|
|
PandasObject.true_range = true_range
|
|
PandasObject.mid_price = mid_price
|
|
PandasObject.typical_price = typical_price
|
|
PandasObject.vwap = vwap
|
|
PandasObject.rolling_vwap = rolling_vwap
|
|
PandasObject.weighted_bollinger_bands = weighted_bollinger_bands
|
|
PandasObject.rolling_weighted_mean = rolling_weighted_mean
|
|
|
|
PandasObject.sma = sma
|
|
PandasObject.wma = wma
|
|
PandasObject.hma = hma
|