主题：开仓信号

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老师，怎么限定1根K只开1次

if upper-MID<100*mindiff and  upper-MID<80*mindiff and c<ma30 then begin
buy(1,1,MARKETR);
end

if MID-LOWER<120*mindiff and upper-MID<100*mindiff and c<ma30 then begin
buy(1,2,MARKETR);
end

if   MID-LOWER<120*mindiff and c<ma30 then begin
buy(1,3,MARKETR);
end