发一个布林回踩买的指标，指标思路源于论坛坛友求助帖，指标为主图和副图，为通用源码。

{布林回踩买主图}
MA2:MA(C,2);
 MA26:MA(C,26);
布林上轨:MA(CLOSE,20)+2*STD(CLOSE,20);
 XG1:=CROSS(MA2,布林上轨);
XG2:=L<=MA(C,26) AND C>=MA(C,26);
 XG:=COUNT(XG1,30)=1 AND XG2 AND FILTER(XG2,10);
 DRAWTEXT(XG,L*0.98,'★回踩买'),COLORYELLOW;

 {布林回踩副图}
A1:=MA(C,2);
 A2:=MA(CLOSE,20)+2*STD(CLOSE,20);
 XG1:=CROSS(A1,A2);
 XG2:=L<=MA(C,26) AND C>=MA(C,26);
 COUNT(XG1,30)=1 AND XG2 AND FILTER(XG2,10);