XF 1.4 Is there a way to see what members are viewing a thread?

[kella]

If not natively, any suggestions for an add-on that would do this? I'd like each thread to be able to show who is currently viewing it.

 

[empire]

https://xenforo.com/community/resources/raindd-user-activity-users-viewed-viewing-thread.3178/

I should add that we're using this on a large forum running xf1.5 and it's working fine.