Zend certified PHP/Magento developer

If Statement for Timeline in Excel

I created a timeline for 60 days. Problem is, there might be delays so “Milestones” might move up or down. The problem I am having is that all 60 days show up on the timeline, which you can imagine looks a mess. I would like to make it so that the date will not show up unless there is a milestone written in column A.

So in the “Heights” column, I am guessing there needs to be an if statement? (If A3 contains characters then -1 or 1 depending on if cell A2 is - or +).

Sample