主题：帮忙写个BOLL线的程序

input:M(95,5,100,10),K(9,0.4,10,1),SS(1,1,10000,1);
//中间变量
MID:  MA(CLOSE,M);//布林中轨
UPPER: MID + K*STD(CLOSE,M);//布林上轨
LOWER: MID - K*STD(CLOSE,M);//布林下轨
手数:=ss;
//交易条件
if  ref(close,1)>UPPER then //开多
begin
buy(holding>=0,ss,MARKET);
end

if ref(close,1)<LOWER then //开空
begin
buyshort(holding<=0,ss,MARKET);
end

//止损
if holding>0 and close<=LOWER  then sell(1,holding,MARKET);
if holding<0 and close>=UPPER then sellshort(1,holding,MARKET);

范例，仅供参考。