make units shoot and move

is there any trigger to make a unit run and shoot at the same time ??
i really need that trigger if it does exist

The only way to do this is to constantly move an invisable dummy unit to the position of the unit. That's how its done in Battleship Command and Tank Commanders

okey... but my map is kinda strange because there is going to be like 15k of soliders shooting at the same time wont that cause lag then .. .

Yes. But in any case the game can't handle 15k units, so what's a little more lag eh?

oh :(
i was going to make an american war |movie then|
cause i had some really good ideas
well then i will just make a little part of the war in a little town with like 400 units
and use the triggers will that cause much lag ?

If it is a movie you don't really need to make the invisible units, just special effects and that stuff

Phoenix Fire will do