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我觉得靠信号控制卖很难。买入相对容易,比如一百个买入信号,只需要挑选几率最高的几个就行。卖出信号也是有很多,看错一个就倒霉。仅控制上下限又容易被洗出去。总之,卖出时机是个世界级的难题啊。

szs11 (Hedge)
(#98056@43)
2009-7-21
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