From the beginning of my first time trading in cryptocurrencies, I have never seen or heard of an exchange like HB DEX. By my knowledge of this project, HB DEX is a completely decentralized exchange market that operates hand in hand with its own based wallet, the HB wallet which has been launched since July in the year 2017. HB DEX operates entirely on HB wallet, it is also available as a mobile app for Android and iOS phones and even as a decktop app.
It operates in a completely decentralized manner as all its transactions are conducted on the Ethereum blockchain network. However it only supports tokens built on the Ethereum blockchain network, that is, it is ERC-20 compactible. I really like it because it enables anonymous transactions, it is secure and conducts fast transactions with ERC-20 but the problem is that, you can only trade a token paired with ETH and also ETH for other ERC-20 and this brings a restriction.
Moreover, I checked its social media sites and other of its explorable channels because it is available on Facebook, Twitter, Discord, telegram, Reddit LinkedIn and GitHub. On, my visit to its Twitter account, I found out that it has a fair number of followers and that is not motivative.
Finally, I would advise you to make your own research on it and get better details of it so that you might not fall into the wrong hands.