D:=IF((H PC AND L =PC) OR (L PC AND H =PC),MAX((H/PC-1)*100,(PC/L-1)*100),((H/PC-1)+(PC/L-1))/2*100);
PD:=MA(D,M);
PCR:REF(PC,1),DOTLINE,COLORGRAY;
UW1:REF(PC*(1+PD/100),1),COLORBLUE;
LW1:REF(PC*(1-PD/100),1),COLORRED;
UW2:REF(PC*(1+1.5*PD/100),1),COLORCYAN;
LW2:REF(PC*(1-1.5*PD/100),1),COLORYELLOW;