Okex is one of the largest crypto multi currency exchange, It is a subsidiary of the famous OKCoin exchange based on mainland China, and was split off in May 2017 to handle the futures trading part of the OKCoin business, so that OKCoin could focus on fiat/crypto exchange.
Okex over time has time gained alot of popularity and has regularly been ranked as top three exchanges by CMC according to 24hr trading volume.
Okex support trading of over 100 major coins and tokens in an easy and intuitive way through it website or mobile client, however KYC is adviced in order to be able to make withdrawals.