‘‘‘backtest
start: 2020-05-01 00:00:00
end: 2021-08-10 00:00:00
period: 15m
exchanges: [{"eid":"Futures_OKCoin","currency":"BTC_USD"}]
‘‘‘

import pandas as pd
import time

def main():
    exchange.SetContractType("quarter")
    preTime = 0
    Log(exchange.GetAccount())
    while True:
        records = exchange.GetRecords(PERIOD_M15)
        if records and records[-2].Time > preTime:
            preTime = records[-2].Time
            doTicker(records[:-1])
        Sleep(1000 *60)

       
def doTicker(records):
    #Log(‘onTick‘,exchange.GetTicker())
    M15 = pd.DataFrame(records)

    #Factor=3
    #Pd=7
    
    M15.columns = [‘time‘,‘open‘,‘high‘,‘low‘,‘close‘,‘volume‘,‘OpenInterest‘]  
    
    #HL2
    M15[‘hl2‘]=(M15[‘high‘]+M15[‘low‘])/2

    #ATR(PD)
    length=Pd
    M15[‘prev_close‘]=M15[‘close‘].shift(1)
    ranges= [M15[‘high‘] - M15[‘low‘],M15[‘high‘]-M15[‘prev_close‘],M15[‘low‘]-M15[‘prev_close‘]]
    M15[‘tr‘] = pd.DataFrame(ranges).T.abs().max(axis=1)
    alpha = (1.0 / length) if length > 0 else 0.5
    M15[‘atr‘]=M15[‘tr‘].ewm(alpha=alpha, min_periods=length).mean()


    M15[‘Up‘]=M15[‘hl2‘]-(Factor*M15[‘atr‘])
    M15[‘Dn‘]=M15[‘hl2‘]+(Factor*M15[‘atr‘])
    
    M15[‘TrendUp‘]=0.0
    M15[‘TrendDown‘]=0.0
    M15[‘Trend‘]=1
    M15[‘Tsl‘]=0.0
    M15[‘linecolor‘]=‘Homily‘
    M15 = M15.fillna(0)

    for x in range(len(M15)):
        M15[‘TrendUp‘].values[x] = max(M15[‘Up‘].values[x],M15[‘TrendUp‘].values[x-1])