主题：收盘前5分钟平仓怎么写？

N:=5;
abb:=timetot0(CLOSETIME(0))-time0,NODRAW;//当前K线时间距离收盘K线结束倒计时
abb3:=timetot0(CLOSETIME(0))-timetot0(dynainfo(207)),NODRAW;//当前时间距离收盘K时间    
IF     (abb<N*60 and abb>=0 and (not(ISLASTBAR))) or (ISLASTBAR and  abb3>=0 and abb3<N*60) THEN //兼顾实际交易时候的信号和历史回测信号
begin
sell(holding>0,holding,market);
sellshort(holding<0,holding,market);