20天均线好的原因是2000年前避免了在几个大波动中亏钱。2009年后MM控盘已经发生变化,用20天线收益比长持差太多。
本帖于 2023-12-28 07:24:50 时间, 由普通用户 ybdddnlyglny 编辑
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