QA:=REF(H,10)=HHV(H,2*10+1);
QB:=BACKSET(QA,10+1);
QC:=FILTER(QB,10) AND H=HHV(H,10+1);
QD:=BARSLAST(QC);
QE:=IF(QC,CURRBARSCOUNT,0);
QF:=IF(QD,REF(QE,QD),QE);
QG:=CONST(QF);
QH:=REF(QF,QD+1);
QW:=CONST(QH);
DRAWLINE(CURRBARSCOUNT=QW,H,CURRBARSCOUNT=QG,H,1),COLORYELLOW;
