主题：[求助]如下代码没有显示多头信号？

input:man(26,2,200);

ma1:=ma(close,man);
ccm:=cross(close,ma1);
cmc:=cross(ma1,close);

资产:ASSET,LINETHICK0;
可用现金:CASH(0),LINETHICK0;
持仓:HOLDING,LINETHICK0;

if ccm then
begin
//平空开多
sellshort(holding<0 and ccm,0);
buy(holding<=0,1);
end

if cmc then
begin
//平多开空
sell(holding>0 and cmc,0);
buyshort(holding>=0,1);
end