I've been looking at this as well. Here's my exaulted newbie, take-it-with-a-grain-of-salt advice:
Find your "overtake" page on ExtremeOverclock.com. For instance: here.
The light grey people are ones that are going away from you, in either direction. The red people are the ones overtaking you. The green people are the ones you are overtaking. If you add the grey people above you and the red people below you (including me, coming up on you in 64th place), you should have a generally good indicator, all things being equal, of the highest position you can attain.
"I've been looking at this as well. Here's my exaulted newbie, take-it-with-a-grain-of-salt advice:"
Here's my suggestions:
These are simple rankings of current relative performance, but a best guess of where things may end up if there are no changes (generally a poor assumption).