Mark of Torment

Howdy,

Mechanics question regarding mark of Torment. Do I need to stay within a certain distance of the marked mob in order for the effects of MoT to take place or can I run and kite?

I have searched and I find many discussions regarding how the skill works but nothing regarding my question.

Appreciate any input - thank you!

The connection will tear off if you go too far away.
About when you reach a screen-wide distance to your target.