From: OriginalStealth on
I have a column chart. Data series is 5/1, 5/2, 5/3...all the way to last
day of month. I need to plot a straight target line starting at 0 on 5/1 and
goes all the
way to the highest point of the last entry total which would be 5/31. So
basically i am just drawing a diagnal line from 0 the the last data point.
Any idea on how to get this done? Also, my data is doing a running sum

Thanks in advance