How to show my "UPS"?

Hey guys I wish i could find a method to show the current UPS in-game like gocnak. Does anyone knows how this works ?

He’s using a mod he created called Ghosting Mod.

Download: https://dl.dropboxusercontent.com/u/58448223/ghostingmod.zip

You can either use ghosting as PJC mentioned or use a console variable cl_showpos 1 which displays your position, viewangle and speed in the top right corner.