Custom field on ticket (counter)

Hi all,

Not sure the topic is right, I need to create a custom field on ticket which shows the same number that comes up on the upper top bar (as per email below). 
In sum: whenever the type is "Problem" and a related “Incident” is created, I'd like to have a custom “counter” field on the ticket that works with the same criteria of the one showing up on top. Is there a way to do that?