stable/freqtrade/analyze.py

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import logging
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import time
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from datetime import timedelta
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import arrow
import talib.abstract as ta
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from pandas import DataFrame
from freqtrade import exchange
from freqtrade.exchange import Bittrex, get_ticker_history
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logging.basicConfig(level=logging.DEBUG,
format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
logger = logging.getLogger(__name__)
def parse_ticker_dataframe(ticker: list, minimum_date: arrow.Arrow) -> DataFrame:
"""
Analyses the trend for the given pair
:param pair: pair as str in format BTC_ETH or BTC-ETH
:return: DataFrame
"""
df = DataFrame(ticker) \
.drop('BV', 1) \
.rename(columns={'C':'close', 'V':'volume', 'O':'open', 'H':'high', 'L':'low', 'T':'date'}) \
.sort_values('date')
return df[df['date'].map(arrow.get) > minimum_date]
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def populate_indicators(dataframe: DataFrame) -> DataFrame:
"""
Adds several different TA indicators to the given DataFrame
"""
dataframe['sar'] = ta.SAR(dataframe)
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dataframe['adx'] = ta.ADX(dataframe)
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stoch = ta.STOCHF(dataframe)
dataframe['fastd'] = stoch['fastd']
dataframe['fastk'] = stoch['fastk']
dataframe['blower'] = ta.BBANDS(dataframe, nbdevup=2, nbdevdn=2)['lowerband']
dataframe['sma'] = ta.SMA(dataframe, timeperiod=40)
dataframe['tema'] = ta.TEMA(dataframe, timeperiod=9)
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dataframe['mfi'] = ta.MFI(dataframe)
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dataframe['cci'] = ta.CCI(dataframe)
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return dataframe
def populate_buy_trend(dataframe: DataFrame) -> DataFrame:
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"""
Based on TA indicators, populates the buy trend for the given dataframe
:param dataframe: DataFrame
:return: DataFrame with buy column
"""
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dataframe.loc[
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(dataframe['close'] < dataframe['sma']) &
(dataframe['tema'] <= dataframe['blower']) &
(dataframe['mfi'] < 25) &
(dataframe['fastd'] < 25) &
(dataframe['adx'] > 30),
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'buy'] = 1
dataframe.loc[dataframe['buy'] == 1, 'buy_price'] = dataframe['close']
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return dataframe
def analyze_ticker(pair: str) -> DataFrame:
"""
Get ticker data for given currency pair, push it to a DataFrame and
add several TA indicators and buy signal to it
:return DataFrame with ticker data and indicator data
"""
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minimum_date = arrow.utcnow().shift(hours=-24)
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data = get_ticker_history(pair, minimum_date)
dataframe = parse_ticker_dataframe(data['result'], minimum_date)
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if dataframe.empty:
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logger.warning('Empty dataframe for pair %s', pair)
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return dataframe
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dataframe = populate_indicators(dataframe)
dataframe = populate_buy_trend(dataframe)
return dataframe
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def get_buy_signal(pair: str) -> bool:
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"""
Calculates a buy signal based several technical analysis indicators
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:param pair: pair in format BTC_ANT or BTC-ANT
:return: True if pair is good for buying, False otherwise
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"""
dataframe = analyze_ticker(pair)
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if dataframe.empty:
return False
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latest = dataframe.iloc[-1]
# Check if dataframe is out of date
signal_date = arrow.get(latest['date'])
if signal_date < arrow.now() - timedelta(minutes=10):
return False
signal = latest['buy'] == 1
logger.debug('buy_trigger: %s (pair=%s, signal=%s)', latest['date'], pair, signal)
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return signal
def plot_dataframe(dataframe: DataFrame, pair: str) -> None:
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"""
Plots the given dataframe
:param dataframe: DataFrame
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:param pair: pair as str
:return: None
"""
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import matplotlib
matplotlib.use("Qt5Agg")
import matplotlib.pyplot as plt
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# Two subplots sharing x axis
fig, (ax1, ax2, ax3) = plt.subplots(3, sharex=True)
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fig.suptitle(pair, fontsize=14, fontweight='bold')
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ax1.plot(dataframe.index.values, dataframe['close'], label='close')
# ax1.plot(dataframe.index.values, dataframe['sell'], 'ro', label='sell')
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ax1.plot(dataframe.index.values, dataframe['sma'], '--', label='SMA')
ax1.plot(dataframe.index.values, dataframe['tema'], ':', label='TEMA')
ax1.plot(dataframe.index.values, dataframe['blower'], '-.', label='BB low')
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ax1.plot(dataframe.index.values, dataframe['buy_price'], 'bo', label='buy')
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ax1.legend()
ax2.plot(dataframe.index.values, dataframe['adx'], label='ADX')
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ax2.plot(dataframe.index.values, dataframe['mfi'], label='MFI')
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# ax2.plot(dataframe.index.values, [25] * len(dataframe.index.values))
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ax2.legend()
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ax3.plot(dataframe.index.values, dataframe['fastk'], label='k')
ax3.plot(dataframe.index.values, dataframe['fastd'], label='d')
ax3.plot(dataframe.index.values, [20] * len(dataframe.index.values))
ax3.legend()
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# Fine-tune figure; make subplots close to each other and hide x ticks for
# all but bottom plot.
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fig.subplots_adjust(hspace=0)
plt.setp([a.get_xticklabels() for a in fig.axes[:-1]], visible=False)
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plt.show()
if __name__ == '__main__':
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# Install PYQT5==5.9 manually if you want to test this helper function
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while True:
exchange.EXCHANGE = Bittrex({'key': '', 'secret': ''})
test_pair = 'BTC_ETH'
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# for pair in ['BTC_ANT', 'BTC_ETH', 'BTC_GNT', 'BTC_ETC']:
# get_buy_signal(pair)
plot_dataframe(analyze_ticker(test_pair), test_pair)
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time.sleep(60)