我正在使用backtesting.py库https://kernc.github.io/backtesting.py/doc/backtesting/index.html
这是什么错误？用户警告：数据索引不是日期时间。假设为简单的期间，但建议使用“pd.DateTimeIndex”。bt =回溯测试（数据，测试2，现金=100000，佣金=.002）

import pandas as pd
from backtesting import Strategy
from backtesting import Backtest

data = pd.read_csv('I:/algotrading/BTCUSDT.csv')
data.columns = ['Time','Open','High','Low','Close'];

class test2(Strategy):
    def init(self):
        pass

    def next(self):
        # OHLC
        self.open = self.data.Open
        self.high = self.data.High
        self.low = self.data.Low
        self.close = self.data.Close

        if(self.close > self.open):
                self.position.close()
                self.buy()

        elif(self.close < self.open):
                self.position.close()
                self.sell()

bt = Backtest(data, test2, cash=100000, commission=.002)
stats = bt.run()
print(stats)
bt.plot()