How to setup an low stock alarm on version 4?

How to setup an low stock alarm on version 4? I need the system to send a warning sign that stock amount Is below 5.

Thank you for your help in advance .
I found no other post showing so

Type in “Stock Level” into the search and the forst post is a step by step guide to create on the fly stock level from ticket screen

I have also created an automatic “pop up” that alerts you when stock is below a certain level

You will need to upgrade to V5, this isnt available for V4

Thank you Thank you Thank you Thank you
Thank you Thank you Thank you
Thank youThank youThank you Thank you