I am running some backtests using the algorithm lab and I'm wanting to use sort of persistent blacklist of symbols that will be used within the universe selection model and then updated by the risk management model. I don't want the blacklist to reset everytime the code stops and I want to edit the blacklist outside of code (so I can exclude certain symbols from selection manually - but again I want it updated from code also)

Ftp would seem like obvious choice, but I cannot seem to upload/append files via ftp. It seems there is API level and proxy level control in place.

Any other ideas/possibilities?