What triggers counter charge.
I'll use Ol'rowdy as the counter charging model in the example.
Rowdy has a model within 6 inches, there is no obstacle between the two and he has LOS.
On the opponents turn the enemy model forfeits it's movement to aim. Is this a trigger?
How about this one
The enemy model has reach and is 1 and half inches from Rowdy. The enemy model moves zero inches. Is this a trigger?