Comment a remarkable point in a graphic

I have a graphic like this one, based on dates/values:

Some points on the graphic represent special events, and I’d like to associate them with a comment, like: “Called the manager”, “Strike”, … keeping the comment that shows the value if present.

I can add that comment in the table of values if needed.

How may I do this?

Check out the Rob Bovey’s XY Chart Labeler Add-in it might do what you want. Otherwise insert - text box will insert a text box you can move to the front and display it.

Unfortunately, there is no functionality currently to add comment bubbles to points on an excel chart, though that seems to be exactly what you want, right?