Unfortunately, the forum history found at the bottom of the Statistics center has stopped updating since December 2017. That is why only the total number of posts, online members, members and created topic can be seen in real time.

I remember there is a newbie who created a real time Bitcointalk Stats Live Counter. You can look for further information regarding that topic. Here is tha link: I created the Bitcointalk Stats Live Counter

You can also check an interesting stats viewer created by DdmrDdmr

It is also good to mention this thread created by tranthidung which is (Un)official pages that store forum data

And of course from LoyceV [overview] LoyceV's useful data on Bitcointalk