I am currently trading in fours sites namely, Bittrex, Binance, Kucoin and Etherdelta. Since bittrex is out of the question then I would recommend Binance first though they are randomly opening the new user registration nowadays because of the flock of new user so better be attentive when there is an update of accepting new users because they might close it after some time. There is a 50% discount of fees too if you opt to pay the trading fee with their coin BNB and plenty of coins to choose from. Kucoin is a new exchange but gaining some volume as well. They have a lot of promotions and you have a share of the fees too if you buy their coin KCS. Etherdelta is a decentralized exchange and you can only trade ETH as base coin but you can find cheap coins there before being listed in big exchanges.