Twirex will have other currencies traded to TWC.
Similar to other exchanges having LTC/BTC, XPM/BTC and other pairs, Twirex will have LTC/TWC, XPM/TWC and so on.
That's how I understand "Twilight coin will be one of the base currencies".
By design Twirex will allow to use leverage for trading.
That's a huge difference from the other markets. And in the beginning it'll be available for TWC markets only.
Mine while you can, you gonna need your coins for trading at Twirex!