Hi! You now have or will soon have the preview version of the streaming API documentation on your USB stick. As I mentioned, I actually forgot to document the parameter for giving you enough data to cover the gap between the latest stuff in the REST API and the version of "now" in the live stream. You do it like this: socket.emit('atlas_subscribe', { msm: MSM_ID, sendBacklog: true }) This will give you an "amount" of data (currently 4 minutes, but we reserve the right to change this!), which is intended to cover that gap in the vast majority of cases. You will have to deal with duplicate results if you're trying to join on to the end of a REST API dataset. Sorry for the omission. Of course you can come and talk to me if you have any other queries. Cheers, Chris