I think the best exchange in the entire crypto space that suits every set of trading requirement is binance. It provide the best and cheapest trading services in the entire industry and talking about volume and liquidity, it has almost the highest which result in quick trades as a lot of traders are active on the exchange. Binance is known for it's constant updates towards better user interface, security, trading services as well as bridging the gap between crypto and Fiats, anyone looking for a good exchange should consider binance