Manoj Bhai check below code, I think its same what u asking, but not sure......
Code:
_SECTION_BEGIN("OBVPDC");
ND = Day()!=Ref(Day(),-1);
LB = Ref(ND,-1);
Ob = OBV();
Zero = ValueWhen(LB,Ob);
Plot(Zero,"",colorRed,styleNoLabel|styleNoRescale|styleStaircase|styleDashed);
_SECTION_END();
Varun ji said he uses obv level at 0916 so need to make changes in this code.
I will try and if failed will ask Happy ji for the solution.
Thanks