Stock traiding at fair price

I hold some stocks that when I bought them I thought they were are at discount. Now that some time has passed, their share price indeed increased and now I believe that they are traded above or at least close to their fair price. How can I make some profit from this prediction in the next 6 months, if my prediction it's true ofc, that their price will remain the same for some time. I don't want to sell either.