The other type of rating is CR, Current Rating. This is the rating that your character earns by winning and losing matches, the one that's shown in green and red letters in the main part of the scoreboard. It's also the rating that gets you titles and mounts. Every season CR is reset to 0, while MMR remains what it was last season. So, if you ended season 14 on an MMR of 1800 and a CR of 1880, you'd have begun season 15 with an MMR of 1800 and a CR of 0.
What happens next is that as you win games, your CR increases towards your MMR. You should expect it to stabilize as you reach a CR that's near your MMR. As you win and lose games, your MMR will also shift. Your MMR aims to give you a 50/50 win-loss rate, as when that's achieved you're being pretty evenly matched.
Filed under: PvP