Realtime list of follower/following

[MaziBoustani]

To get the list of follower/following I use Twitter API; however, how can I have a realtime (close to realtime) changes?
For example, if after I got the list of followers for specific user that user follow/unfollow someone, how can I get the updated list (instead of getting list of all followers again?)

[andypiper]

You’d have to use the Streaming API to monitor for follow/unfollow events.