IF A>B THEN
begin      {要先平仓，再开仓}
sellshort(HOLDING<0,0,THISCLOSE);
buy(HOLDING=0,N,THISCLOSE);
end
IF A<B THEN
begin      {要先平仓，再开仓}
SELL(HOLDING>0,0,THISCLOSE);
buyshort(HOLDING=0,N,THISCLOSE);
end

IF HOLDING>0 THEN
begin      {要先平仓，再开仓}
SELL(A>B,0,THISCLOSE);
buyshort(A>B,N,THISCLOSE);
end
IF HOLDING<0 THEN
begin      {要先平仓，再开仓}
sellshort(A<B,0,THISCLOSE);
buy(A<B,N,THISCLOSE);
end

==================

这能解决信号消失问题吗？心中没底，请各位老师指点。