策略1:
z:DAY>=25 and DAY<=31,NODRAW;//开平仓条件
buy(not(z),1,limit,ref(l,1)),IGNORECHECKPRICE;
sell(z,holding,MARKET);
持仓:holding;
策略2:
z:DAY>=25 and DAY<=31,NODRAW;//开平仓条件
buyshort(not(z),1,limit,ref(h,1)),IGNORECHECKPRICE;
sellshort(z,holding,MARKET);
持仓:holding;
品种可在图表上自行设置。