请问你，若一套交易系统的胜率只有30%，但赔率可以达到1赔3，也就是盈利是亏损的三倍，你认为怎么样呢？我会说，这是一套不错的系统。为什么呢？仔细看分析：
10次为一个交易周期，每次赚就3，赔就1
10次全亏， 亏10
9次亏，1次对， 亏6
8次亏，2次对， 亏2
7次亏，3次对， 赚2（请注意，这就是30%胜率，赔率一赔三的情况）
6次亏，4次对， 赚6
5次亏，5次对， 赚10
4次亏，6次对， 赚14
3次亏，7次对， 赚18
2次亏，8次对， 赚22
1次亏，9次对， 赚26
10次全对， 赚30
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