I have a simple worksheet that has two columns of data, column A is
month and year, column B is a four digit number. What I'm looking to
do is get an average when a cell is selected. The average would
populate in cell D3. So, let say I click or select cell B18, the
formula should be something like =average(b7:b18) for cell D3. In
other words when a cell is select that the average counts back 12
cells up. I'm looking to get the average number for a 12 month span.
If I select cell B19, then the code should be for an average
=average(b8:b19). Make sense?

Any ideas on some vba code that would do this?