Hello. My best regards for the work done here.
I would like to put an alert on this attached indicator (line crossings), but I do not know.
I would be very grateful if any of the illustrious programmers could help me too.

If not ask too much and it is possible to also put the email alert.

Thank you.
"## Contrast indicator" in attached.

Note 1. I erred, I will post with the "source code"

Note 2. Sorry, I searched and I do not have the source code. Thank you very much.