The gateway is between NXT and Horizon. This fork - see above - not living. It will be not more exists, if all nodes, they just using it, make a restart.
If you created the currency before this fork - your currency is safe and living. Is your node updates the blocks? If yes - your node is on the living chain. (or an another, but living fork ) I wish you are lucky, and your currency not on a fork. You can check it with the Online Wallet (use your account address, and NOT your passphrase to log in):

http://nexthorizon.github.io/hz-source/

It was a question which exchange I using for the new Horizon Market. I choosed NXT Asset Exchange, and NOT Horizon Asset Exchange, because I see - NXT is more stable at this time. I hope - if the Market established - Horizon become more good new user, more nodes, more nodes, they forging and will be a stable currency.