How to add a market (Not list a new market)

[AzmiHbops]

I’ve been trying to list a market not on the default list. How can I add a market to my implementation of the dex? Note that it’s not about adding a new token to the DEX but listing an existing martlet on my personal DEX

[andreihrs]

https://github.com/project-serum/anchor/blob/master/tests/swap/tests/utils/index.js - I guess there are plenty of directions here