You might consider adding USDe trading. It's growing stable, week #3 from launch. Net hashrate stable over 1GH/s and trading volumes of hundreds of BTC's per day on small beta-stage exchanges that are the only one realizing to take profit from this. It's also been more profitable for mining than doge for it's whole existence. Real opportunity building up. FYI, love your exchange and webdesign, it would be so neat to do all my trading here... USDe included.

More info:
https://bitcointalk.org/index.php?topic=410254.0
http://usd-e.com/
https://www.coinmarket.io/