opjose

It depends upon what you want and the TX you are using.

I fly these planes with a computer controlled transmitter, so I set up a good bit of expo ( about 50% ) on both high and low rates. That lets me maximize my high rate throws.

If you are using a non-computer controlled TX then you want to keep the movement somewhat low, no more than 10-15mm, and even that may seem twitchy in any sort of breeze or light wind if you are not used to flying without Expo.