How to mark the last post I've read?

In the old Forum, it could keep track of what the last post you read was, so the next time you accessed the Forum, it was clear where to start reading.

In this new Discourse forum, it will show us what we’ve read in threads we’re tracking, but for those of us who like to see new topics, there’s no way to tell where the “old” new topics ended - i.e., the last ones I read that I’m not tracking - and where the “new” new topics - i.e., the ones I haven’t yet read - begin.

Or am I missing something?