I'm not official yet butive been tracking my moods for a while and it seems like every two-3 weeks it happens that I feel my mood lighten over the course of 2-3 days so I know that the days following will be high days, if that makes sense. I seem to climb to the high and then just wake up one morning in the crapper. I'm sure that most people's cycles are very predictable once you pay attention. of couse, not all, because we are each very different!