主题：策略编写求助

ma2:=ma(c,2);
ma4:=ma(c,4);
ma6:=ma(c,6);
kd:= ma2>ma4 and ma4>ma6 and c<3500;//开多条件
pd:=c<ref(llv(l,20),1) or ma2<ma4;//平多条件
kk:=ma2<ma4 and ma4<ma6 and c>3500;//开空条件
pk:=c>ref(hhv(h,20),1) or ma2>ma4;//开空条件
s1:floor(((3500-c)/3500)*100);
ss:max(s1,1);//开仓手数

buy(holding=0 and kd,ss,marketr); //开多
sell(holding>0 and pd,holding,marketr); //平多
buyshort(holding=0 and kk,ss,marketr);//开空
sellshort(holding<0 and pk,holding,marketr);//平空