(adsbygoogle = window.adsbygoogle || []).push({}); how does the ranking system in gears of war 2 work?

it depends how much matches you have won or loss

i stil havnt figured this out but my friend is lvl 4 and he said it all has to do you with the k/d and w/l spread if you get above 1.0 in both w/l and k/d he said you should rank up but i doubt it,