Look at https://community.jmp.com/t5/Discussions/Efficient-moving-average-algorithm/m-p/8553#U8553.

The time for each post is wrong (for me). I set my timezone in My Settings, but the times are shown three hours off. I suspect that the post time that you're pulling in the component is the system time (which is PT) and needs to be adjusted for each user according to their preference.