So I just noticed this on the stats page when I was browsing through. I'm guessing it's a measurement of how good(or bad in my case) you are in crucible rather than straight up k/d. I stink at pvp so my score is pretty low but I'm wondering what someone who considers themselves a good pvp'er combat ratings are. Also my trials rating is double that of my others even though I suck even harder at that, go figure...