30日内出现2次以上的A信号，或者出现2个B和一个A，可视为牛股；加入股票池重点关注，可逢低介入

HSL:100*VOL/CAPITAL,VOLSTICK;
 M3:=SMA(HSL,3,1);
 MH1:MA(HSL,5),COLORRED;
 MH2:MA(HSL,10);
 MH3:MA(HSL,20);
 MH4:MA(HSL,100);
警戒值:MH3/MH4,COLORRED,NODRAW;
 S1:=警戒值-LLV(警戒值,30);
 IF(UPNDAY(MH4,3)&&警戒值>0.7,MH4,DRAWNULL),COLORBLUE;
 R1:=(OPEN+2*CLOSE)/3;
 A1:=(R1*6+REF(R1,1)*5+REF(R1,2)*4+REF(R1,3)*3+REF(R1,4)*2+REF(R1,5)*1)/21,LINETHICK3,COLORGREEN;
 BA1:=(A1-REF(A1,1))/REF(A1,1)*100;
 AB:=HSL/REF(HSL,2)*100;
 AB2:=HSL/REF(HSL,1)*100;
 DRAWTEXT(AB<55&&REF(AB2,1)>50&&REF(BA1,2)>1&&REF(HSL,2)>2.5&&HSL<6,2*HSL,'A'),COLORWHITE;
 ZF1:=(CLOSE-REF(CLOSE,1))/REF(CLOSE,1)*100;
 DRAWTEXT(AB2<60&&AB2>50&&REF(BA1,1)>0.5&&HSL>1.2&&HSL<6,2*HSL,'B'),COLORWHITE;
 DRAWTEXT(AB<55&&REF(AB2,1)>50&&REF(HSL,2)>2.5&&HSL<6&&AB<40&&ZF1<3&&BA1<-0.3,3*HSL,'选择突破方向'),COLORWHITE;
 AX1:=(CLOSE-REF(CLOSE,1))/REF