模拟账户重复开仓

一个模拟账户下有两个策略，一个买，一个卖，日线运行。昨晚21点开仓点，今天又有开仓。部分代码如下：

Cocktail_fast = AverageFC(Cocktail, fastlength);
Cocktail_slow = AverageFC(Cocktail, slowlength);

       If(marketposition == 0&&Cocktail_fast>Cocktail_slow)
           buy(1,Open);
       If(marketposition == 1&&Cocktail_fast<Cocktail_slow)
           Sell(1,Open);