Hello I have used so many exchanges likes IDEX, etherdelta, qrypto, yobit and some other exchanges as well. What do you think is the best. I use qrypto most.
It's probably not the best idea to judge an exchange solely based on its fees. e.g. Yobit may have lower fees than another more trusted exchange, but you would probably use the trusted exchange for the sake of convenience and security.
I'd agree with BitHodler, Binance seems to be the best exchange for now, if you aren't willing to verify yourself and you're simply trading with smaller amounts. It's got a nice balance between security, convenience, anonymity, and fees. You might find that if you are wiling to get verified, there are certain exchanges with lower fees, although probably not that much lower. Won't make much of a difference if you're trading small amounts anyways.
Whatever you do, avoid Yobit. If you're still using it, please stop using it.