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今天上午测试的结果和下午完全不一样了，是否动过历史数据呢，测试的是最近一年的数据。两个测试结果相差太大了，导致无法使用原有的模型，今天之前进行回测，结果都是一样，为啥今天下午开始就不行了呢，具体哪个时间不太清楚，估计是今天下午发生的
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