I have a series like so:

Jan 10
Feb 10
Mar 11
Apr 12
May
Jun
Jul

And so on - the rest of the year is blank. When I draw a line chart for the
full 12 months the series draws a line up to April, then plummets to zero in
May. I want the line to just stop at April. If I use a series as above and
genuine empty cells for the end of the year this ok, but since my May cell
reads =IF($A11<=$D$17,G11,"") the "" does not seem to get recognised as a
blank cell.

Please help!!