主题：如何编写出信号后回抽到五日线买入？

ss换为mm到底这个mm:cross(holding,0.5);放在结尾有啥用，得出空仓还是多仓？空仓mm为0？

IF ref(BJ=1,1) and ttt and ref(HB,1)and ref(A,1)  and ref(ISUP,1) and ref(CLOSE>REF(L+(H-L)*2/3,1),1) AND ref(SS>0 ,1) and  HOLDING=0 THEN

开多m:BUY(1,1,LIMITR,CLOSE);  //开多

mm:cross(holding,0.5);