Hi all,
I'm stuck at this step.

I have a serial of data (sheet1: cell A4:A20). I would like to add this series to one of 3 existing graphs(ch1, ch2, ch3) using the Combobox drop down list to pick.

the X axis of the existing graph will stay the same. The Y axis will be secondary Y axis(A4:A20)

How can i do this with VBA? A quick reference is much appreciated.