If you have Rich in your Waves wallet, you can trade on the Waves platform. Simply type in Rich into one of the boxes on the top in the trading platform on Waves. The correct token identifier is CisReuNMmhNLBn3dDEahPz2dXQiMTZvgLGGp2s6StDmn and it should show up as RICH in the trading box on top. If you want to know the identifier for the coins you hold in your Waves wallet, you can click the "Details" tab next to the coin, and it will give you the information on the coin.