老师您好！请帮我写一个程序

坚强2878889

市价买入，跌20点止损，涨40点止盈，止盈价跌20点买入，跌20点止损，涨40点止盈，不停的这样做，谢谢

技术008

buy(holding=0 and exitbars=-1,1,marketr);
if close<AVGENTERPRICE-20*mindiff then sell(1,holding,marketr);
if close>AVGENTERPRICE+40*mindiff then sell(1,holding,marketr);
if close<exitprice-20*mindiff then buy(holding=0,1,marketr)