How to generate on a chart or spreadsheet a date line marker
 

How do I generate on a chart or worksheet, a date line marker which
would be a red arrow pointer object.
pointing to the 8th period out of 12 for example.
At this point, the Period # could be given in cell A1. [In the future
I would work directly with dates].
All I remember is that MOVE and TWIPS are involved.
To get some clues, I started the Macro Recorder as usual [From Excel
2007] to insert an arrow pointer,
make it red, position it, etc... but it did not record any of my
actions.
Your help will be appreciated,
J.P.

How to generate on a chart or spreadsheet a date line marker
 

Thanks a lot. This is putting me in the right direction.
JP.