Any chance you could add drkbtc @poloniex to the "hidden" currency pairs (as in: currency pairs that are not in the menu, but can be accessed by URL)?
just saying: I'm not sure if "hidden" currency pairs currently exists.
checkout
https://bitcoinwisdom.com/afaik this page contains list of all implemented currencies (polo drk missing tho)
P.S. just noticed a bug on that page - volume for many altcoins @ mintapl shows as 0 (for example XC, NAUT and others)