DC-Ex is a company for trading that has almost closed all the services for public transactions. Currently, access to the main platform is not being granted. The system does not load content, and the page is practically blocked. If you think this service could be recovered someday, then you should read what other markets have established. They consider this company possess "Untrack Listing" offers and they sadly won't come back with value.
This site can be also part of a scam. Coming news are still pending to be released, but the site contains all the features of fraudulent projects take your precautions to avoid being affected by what the network might be doing.
NOTE: This project is negatively marked at the top. It just holds red flags.