Binance is arguably the best crypto exchange out there. It has a massive selection of coins, various currency pairings, a simple user interface for newbies and advanced trading for pros, and huge trading volumes. They've got all the big players (Bitcoin, Ethereume, Litecoin Dash etc) and tons of altcoins. It's my go-to exchange for trading crypto currency. They also have lots of giveaways and promotions.
Go to their website to check them out: https://www.binance.com/
If you do decide to sign-up and start trading, here is my referral link: https://www.binance.com/?ref=15757215
Have fun!