The Oasis DEX seems inoperative to me as there is no information on how to trade directly on it's platform. They claim to have been the source code to the creation of other popular Decentralized exchange platforms like dydx and kyberswap and so, any trade that one wants to do, will subsequently be redirected to this websites. I think the only thing the platform Currently or only supports is the Algorithm backed stablecoin DAI staking. The platform seems to not be a Decentralized exchange and I really don't understand how it works, except for it's staking as it combines pools from Maker and other aggregator services into it's platform to offer good returns for the users flexible staked DAI