Python Version of Chasing Up and Killing Down Strategy Teaching

'''backtest
start: 2019-02-20 00:00:00
end: 2020-01-10 00:00:00
period: 1m
exchanges: [{"eid":"OKEX","currency":"BTC_USDT"}]
'''

import time

basePrice = -1
ratio = 0.05
acc = _C(exchange.GetAccount)
lastCancelAll = 0
minStocks = 0.01

def CancelAll():
    while True : 
        orders = _C(exchange.GetOrders)
        for i in range(len(orders)) :
            exchange.CancelOrder(orders[i]["Id"], orders[i])
        if len(orders) == 0 :
            break
        Sleep(1000)

def main():
    global basePrice, acc, lastCancelAll
    exchange.SetPrecision(2, 3)
    while True:
        ticker = _C(exchange.GetTicker)
        if basePrice == -1 :
            basePrice = ticker.Last
        if ticker.Last - basePrice > 0 and (ticker.Last - basePrice) / basePrice > ratio :
            acc = _C(exchange.GetAccount)
            if acc.Balance * ratio / ticker.Last > minStocks :
                exchange.Buy(ticker.Last, acc.Balance * ratio / ticker.Last)
                basePrice = ticker.Last
        if ticker.Last - basePrice < 0 and (basePrice - ticker.Last) / basePrice > ratio : 
            acc = _C(exchange.GetAccount)
            if acc.Stocks * ratio > minStocks :
                exchange.Sell(ticker.Last, acc.Stocks * ratio)
                basePrice = ticker.Last
        ts = time.time()
        if ts - lastCancelAll > 60 * 5 :
            CancelAll()
            lastCancelAll = ts 
        LogStatus(_D(), "\n", "Market information:",Tiker,"\n", "Account information.":", acc)
        Sleep(500)