主题：交易系统编写

标红的有两条线，以哪一个为准

if cross(macd1,0) and holding=0 and a1>=ref(a1,1) and a2>=ref(a2,1) and a1>a2 and （a1-a2）/a2<a2*0.1 then buy(1,1,marketr);

if l<ref(l,enterbars) and holding>0 then sell(1,0,marketr);

if h>valuewhen(cross(MACD1>=ref(MACD1,1),0.5),l) and holding>0 then sell(1,0,marketr);

if cross(0,macd1) and holding=0 and a1<=ref(a1,1) and a2<=ref(a2,1) and a1<a2 and （a2-a1）/a2<a2*0.1 then buyshort(1,1,marketr);

if h>ref(h,enterbars) and holding<0 then sellshort(1,0,marketr);

if l<valuewhen(cross(MACD1<ref(MACD1,1),0.5),h) and holding<0 then sellshort(1,0,marketr);