Hi ERIKJD,
Again, I think that you should look through the tutorial on shift registers, and then utilize those to compare values you obtain to previous values instead of a feedback node. Also, as Lynn said earlier, you shouldn't be using comparison functions on a boolean. In your case, I believe you would want to use a boolean AND to determine if the present value is greater than 4.5 and the previous value is less than 4.5, which would trigger your wheel count. I've attached a quick example of this.
