急跌选股指标 (源码)

input:N(50,0,500);
QQ1:=splitbars(0)>N;
QQ2:=(c-ref(c,5))/ref(c,5)*100<-18;
急跌选:(CLOSE-MA(CLOSE,20))/MA(CLOSE,20)*100<-12 AND QQ1 AND QQ2;