Cast AbilityWithout Stopping

Is this possible? I need to cast an ability using a hotkey to set off a trigger, but the unit cant stop when casting it (I mean stop moving, not channeling). ABilities like roar and such have the unit cancle issued orders or atleast pause them. Thankyou for any help you may give.

I don't know if this has anything to do with your problem, but doesn't Barrage target things automatically, without stopping the unit?

The replenish family of spells allow movement while casting. However they are autocast, and while it is easily breakable (Making it never run) it still is quite difficult to fully pull off the allusion. You can see the latest version of DT4:A as I use replenish to do that.

Stomp, thunderclap, feral spirit, headhunter spirit.

These spells do not cause a unit to stop. In tank commanders, the angle up and angle down skills are based off stomp and thunderclap.