Q1:=BARSLAST(CROSS(REF(ZIGZAG(C,1,1),1),ZIGZAG(C,1,1)))+1;
Q2:=BARSLAST(CROSS(ZIGZAG(C,1,1),REF(ZIGZAG(C,1,1),1)))+1;
AA:=BACKSET(ISLASTBAR,MAX(Q1,Q2));
DRAWTEXT(AA&&CROSS(REF(ZIGZAG(C,1,1),1),ZIGZAG(C,1,1)),HIGH,'★'),VALIGN1,ALIGN0,COLORCYAN,FONTSIZE50;
DRAWTEXT(AA&&CROSS(ZIGZAG(C,1,1),REF(ZIGZAG(C,1,1),1)),LOW,'★'),VALIGN1,ALIGN0,COLORMAGENTA,FONTSIZE50;
DRAWHORIZONTALLINE(AA&&CROSS(REF(ZIGZAG(C,1,1),1),ZIGZAG(C,1,1)),H,COLORCYAN);
DRAWHORIZONTALLINE(AA&&CROSS(ZIGZAG(C,1,1),REF(ZIGZAG(C,1,1),1)),L,COLORMAGENTA);