Is there Variable for new posts unread

[omardealo]

Originally Posted by ozzy47

If the user subscribes to their thread, they can get a a email about it, either instantly, daily, or weekly.

YEAH , i know about subscribes ... i don't want use email message
i want alert user by Notification like "there is 5 new post in your thread Etc."
if not there a Variable , what's query can i used it for select new post for thread's user he not read it yet .

thnx so much , I hope that my request will be clear now