Another way to describe it is for example it is the 55th day of the year and the red line indicates that you and I are approximately one sixth of the way through the year. If you were to imagine 366 lines for this year then the red line is on the 55th and will proportionately move with the days. As I understand it.
That makes more sense and explains what the red line means. I am above the required average as can be seen below so it can't be to do with target.