Ok so I was going through my notes last night from a clinic I attended several years ago. It was definitely an eye opener. I ran across no huddle communication lines and I found a very simple way to tell the qb to run the ball/throw the ball to the right or the left. Thumbs up=Right and Thumbs Down=left.
Here is an example of Byron Leftwhich running the no huddle offense
Here is an example of Applachian State University running the no huddle vs. Michigan in 2007.