指标通过计算收盘价与不同周期均线的偏离度（B1-B4），判断超跌和超买区域。
- 超跌信号：当B1<-7、B2<-9、B3<-11、B4<-13同时满足时，显示“超跌”文字，并用蓝色柱线表示。
- 超买预警：当B1>10、B2>15、B3>20、B4<20同时满足时，显示“预警”文字，并用黄色柱线表示。
- 综合线：BL为B1-B4的平均值，BLMA为其6日均线。当BL>21时提示“谨慎”，BL<-10时提示“关注”。
B1:=(CLOSE-MA(CLOSE,6))/MA(CLOSE,6)*100;
B2:=(CLOSE-MA(CLOSE,13))/MA(CLOSE,13)*100;
B3:=(CLOSE-MA(CLOSE,20))/MA(CLOSE,20)*100;
B4:=(CLOSE-MA(CLOSE,30))/MA(CLOSE,30)*100;
STICKLINE(B1<-7,5,0,3,0),COLOR0099FF;
STICKLINE(B2<-9,10,0,2.2,0),COLOR0066FF;
STICKLINE(B3<-11,15,0,1.4,0),COLOR0033FF;
STICKLINE(B4<-13,20,0,0.6,0),COLOR0000FF;
DRAWTEXT(B1<-7 AND B2<-9 AND B3<-11 AND B4<-13,18,'超跌'),COLORYELLOW;
STICKLINE(B1>10,0,-5,3,0),COLORFFFF33;
STICKLINE(B2>15,0,-10,2.2,0),COLORFFCC00;
STICKLINE(B3>20,0,-15,1.4,0),COLORFF9933;
STICKLINE(B4>25,0,-20,0.6,0),COLORFF6633;
DRAWTEXT(B1>10 AND B2>15 AND B3>20 AND B4<20,-10,'预警'),COLORYELLOW;
BL:(B1+B2+B3+B4)/4,LINETHICK2,COLOR000066;
BLMA:MA(BL,6),LINETHICK2,COLORCC0000;
DRAWTEXT(BL>21,BL-2,'◆谨慎'),COLORYELLOW;
DRAWTEXT(BL<-10,BL+2,'◆关注'),COLORYELLOW;
