OK so I am trying to get computer units to move around as if they are looking at something. So I'm using the order location for only a frame and then trying to stop it. However, I can't seem to stop it.

I've tried using MOVE unit to a unwalkable area, but that only stops them while it is firing. As soon as that trigger stops firing they carry on walking.
If I try ordering them to move where they already are they often end up facing directions I don't want.

Any solutions?

Offhand, you could drop a 1x1 mobile grid on the unit shortly before you want it to stop, and order it to move in the direction that you want it to be facing.

OK I figured it out.

If you preserve move it to an unwalkable location for LESS THAN 12 frames, it will continue obeying the previous ORDER direction.

If MORE THAN 12 frames, it will successfully stay frozen.

SOLV'D.