Initially, my favorite trading exchange had been bittrex, since the end of september however, as Chinese coins bounced back and many other variable such as bittrex, not listing anymore new coins and binance listing a bunch of coins everyday, my favorite new exchange became binance.
Although their graphs and trading takes a little getting used to, I actually prefer their trading platform now because the fees there are half as expensive as bittrex's if you use binance coin. Additionally, buying coins there are faster so it would be easier for people who day trade.