So for everyone disagreeing with the last one. You have to look at it from the perspective of the frame. There was a clear start, the leftmost orb. And a clear finish, the rightmost orb. The third line is showing that even if you take steps back at the end of the, let's say week, if you are in a better position than when you started its a good thing. Even if you don't have steady progress you, at the very least, are at a better position to start the next week.