Ethermium exchange is a decentralised exchange with little known information about itself. The exchanges specializes in Ethereum and other ERC20 tokens, and as such one cannot really expect high liquidity on the exchange. The exchange has a very low trading fee, here makers are not charged, only the takers are, and it's just a fee of 0.2%. Since a decentralised exchange deals with anonymity, there's no need to register on this exchange, just connect your wallet and you're good to go. Considering the series of inactivity going on in the exchange, I decided not to trade here nor connect my wallet. From my analysis, the last trade completed on the exchange was on May 8 and since then the exchange has recorded a trading volume of $0. Though the exchange has a good customizable interface, I urge you not to be carried away by the designs and avoid the exchange completely.