Not sure if anyone already posted but you can now trade DASH on the new and upcoming decentralized exchange, Cryptobridge. It is the safest exchange out there as the exchange do not have access to your wallet keys, only you have control of your coins! Would recommend withdrawing your coins to Cryptobridge from the centralized exchanges with all the recent security issues.

https://wallet.crypto-bridge.org/market/BRIDGE.DASH_BRIDGE.BTC

They also pay you to trade there, 25% of the exchange profits go to market makers. Happy trading!