【代码报错】TypeError: '<' not supported between instances of 'NoneType' and 'float'
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期货分钟频布林带策略TypeError: '<' not supported between instances of 'NoneType' and 'float'
请老师帮忙看看问题所在
https://bigquant.com/codesharev3/e05037b1-b7de-4a74-b7d8-2f2e280d0931
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