Follow Liker ratios

I finally purchased Follow liker and I'm learning how to us this tool.
One of the option that puzzles me a little bit is the follow/unfollow ratio.
Many people of this forum talk about how many follow/ unfollow you should do but not the ratio.

I guess that the unfollow ratio should be lower than the follow ratio but is there any "ideal" number?

Thanks !

There is an option called Follow to Following ratio or something like that. You can just leave it at 0 if you want to keep things simple.

If you do want to use the option, one purpose would to keep your number of followings lower than your number of followers. But personally I don't use it.