I would recommend bitfinex to all advance traders in the world. The interface is pretty darn cool. I love all the different charts they offer. Plus there are so many trading pairs that can be traded directly via USDT. The fees is pretty low compared to its competitors. With the addition of recent coins such as XLM, XVG, KNC, VEN etc etc has made profits even higher for me. Keep adding new coins and Features as you do.