I am trying to find out the frequency with which we service certain neighborhood recycling points. In one column I have the dates of service listed, and the next column I have this.... =(F6-F3)/count(F3:F500) formula to figure out the frequency. F6 is the most recent date, however, I am trying to enter into the formula a way to automatically select the last active cell in the column so I do not have to manually change the formula every time I enter a new date. By the way, the (F6-F3) counts the days between the last and first dates, and the count(F3:F500) is counting how many active cells there are to figure out how many pick ups have occured. Thanks for any help and advice.