主题：请帮忙写个公式

ma5:ma(close,5);
ma150:ma(close,150);
if cross(ma5,ma150) then
begin
 sellshort(1,1,marketr);
 buy(1,1,marketr);
end

if cross(ma150,ma5) then
begin
 sell(1,1,marketr);
 buyshort(1,1,marketr);
end

//止损
if close<enterprice*(1-0.008) and holding>0 then sell(1,holding,marketr);
if close>enterprice*(1+0.008) and holding<0 then sellshort(1,holding,marketr);

//止盈
if close>enterprice*(1+0.02) and holding>0 then sell(1,holding,marketr);
if close<enterprice*(1-0.02) and holding<0 then sellshort(1,holding,marketr);

//回撤
if close<hhv(close,enterbars)*(1-0.2) then sell(1,holding,marketr);
if close>llv(close,enterbars)*(1+0.2) then sellshort(1,holding,marketr);

if time = 150000 then
begin
 sell(1,holding,marketr);
 sellshort(1,holding,marketr);
end

//回撤
if close<hhv(close,enterbars+1)*(1-0.2) then sell(1,holding,marketr);
if close>llv(close,enterbars+1)*(1+0.2) then sellshort(1,holding,marketr);

回撤这类改下