Since early this year, CryptoBridge has been my go to exchange to trade my SmartCash. It is a decentralize exchange https://wallet.crypto-bridge.org It averages between $40k to $60k daily in volume.
I have used them for trading many time and it is very good. Except some instances (less than 5%) where the lag is unbearable, the deposit and withdrawal takes minutes and not hours or days for some centralized exchanges.
Recently they added multiple SmartCash pair with other currencies
Some noticeable ones are Dash, Litecoin and Verge. The volume is not much or barely there at all, but hopefully more traders will realized about this pair and trade SmartCash with those currencies.