if you have halo waypoint, you've probably seen the BPR ranking that it has. I think it stands for Battle Percentage Rank. waypoint gives each player a number from 1 to 100 based on kills, deaths, wins, KDR, and lots of other stuff. Its possible to have a high BPR when you're only a low rank because you can have a higher win percentage and KDR than a higher ranked player. For example, my rank in reach right now is field marshall and my BPR is 73. I have friends who have ranks like eclipse and such, and i have a higher BPR than them. the BPR system seems very reliable and i would like to see it used in matchmaking