NN:=20;MIDA:=MA(C,NN);VART1:=POW((C-MIDA),2);VART2:=MA(VART1,NN);VART3:=SQRT(VART2);UPPERA:=MIDA+2*VART3;LOWERA:=MIDA-2*VART3;:REF(MIDA,1)COLORRED,LINETHICK2;UB:REF(UPPERA,1)COLORBLUE,LINETHICK2;LB:REF(LOWERA,1)COLORGREEN,LINETHICK2;下轨:OSS(CLOSE,LB) AND C>REF(C,1)COLORRED;DRAWICON(上穿下轨,L*0.95,7);昨日中轨:=REF(C,1)>BOLL;中轨:=(L-BOLL)/L<=0.01 AND (L-BOLL)/L>=-0.01 AND C>BOLL AND C>O;中轨:=UPNDAY(BOLL,3);回踩中轨:回踩中轨 AND 昨日中轨 AND 中轨连涨,COLORLIRED;DRAWICON(回踩布林中轨,L*0.995,1);收口:=(UB-LB)/LB<=0.25;上穿:=CROSS