Win a game, ratings go down?

I think I just won a game and then my rating went down. However on the chart with the bar graphs it looks like it went up... Why is that?

The reason that your rating went down, is because you still have a provisional rating (<20 games played), read about it in the help files.

Your graph doesn't show the last game you played, but the last-but-one, so your rating probably went up after that game.

Olav