var2:=ref(low,1);var3:=sma(abs(low-var2),3,1)/sma(max(low-var2,0),3,1)*100;var4:=ema(var3*10,3);var5:=llv(low,13);v**:=hhv(var4,13);var7:=ema(if(low<=var5,(var4+v***2)/2,0),3)/618;var8:=if(var7>500,500,var7);周线止跌:var8>1 and "kdj.j">ref("kdj.j",1) and ref("kdj.j",1)<ref("kdj.j",2);注意一定在周线以上的周期选股才能更准确 20210311