【图】请问老师：副图出现第一份蓝柱，怎样做成选股公式

XA_11:=(HIGH+LOW+CLOSE)/3;
XA_12:=(XA_11-MA(XA_11,21))/(0.015*AVEDEV(XA_11,21));
XA_13:=XMA(XA_12,7);
XA_14:=XMA(XA_13,3)/4;
下带:DRAWBAND(XA_14,RGB(100,0,0),0,RGB(0,105,105));
下峰:XA_14,COLORRED,LINETHICK1;

STICKLINE(XA_14<=(-15),(-15),XA_14,1,0),COLORBLUE;

XA_11:=(HIGH+LOW+CLOSE)/3;

XA_12:=(XA_11-MA(XA_11,21))/(0.015*AVEDEV(XA_11,21));

XA_13:=XMA(XA_12,7);

XA_14:=XMA(XA_13,3)/4;

XG:REF(XA_14,1)>15 AND XA_14<=-15;

XA_11:=(HIGH+LOW+CLOSE)/3;
XA_12:=(XA_11-MA(XA_11,21))/(0.015*AVEDEV(XA_11,21));
XA_13:=XMA(XA_12,7);
XA_14:=XMA(XA_13,3)/4;
XG:XA_14<=(-15);