Feature: User configurable alerts & extending concept of "following" an account to other types of objects

[destenson]

As a cool and unique new feature, It might be nice to let a user choose which accounts & objects get subscribed to dynamically.. Like extending the "follow" concept to include accounts you do and don't have keys for, and assets and markets. Maybe even others' trades. It could be cool to be able to subscribe to the second-lowest ask in a market list and possibly be alerted when a price level is reached or when a certain open order gets filled.