function Lastthursday()
{
Daysinmonth=IIf(Month()==1 OR Month()==3 OR Month()==5 OR Month()==7 OR Month()==8 OR Month()==10 OR Month()==12,31,30);
Daysinmonthfeb=IIf(Year()%4 == 0 AND Year()%100!=0,29,28);
Daysinmonthfinal=IIf(Month()==2,Daysinmonthfeb,Daysinmonth);
returnvalue=IIf(Daysinmonthfinal-Day()<7 AND DayOfWeek()==4,1,0);
return returnvalue;
}
Graph0=Close;
shape=IIf(Lastthursday(),shapeDownArrow,shapeNone);
PlotShapes(shape,colorWhite,0,Graph0,-24);