The Top X Bottom X Movers widget displays the topmost and bottommost performers, ordered by the movement of their overall, or sectional, scores.
What does this mean?
In the above example, we can see that District 1 is the top mover out of the 3 districts displayed, when we compare that District's average score from the date range I (11/1 - 11/30) to the date range II (12/1 - 12/31). The exact date ranges can be set through the widget settings.
In the example, the average score for the District 1 was 80.00% for the date range I, 61.13% for the date range II, giving us the 'movement' value of 18.81%.
Hoovering over other bars in the widget will display the same details for each of the districts (or whichever level you set in the widget's settings), while clicking on the date range below the bars will hide, or show, the graphs for those dates.
Remember to check a different help article detailing most of other settings of this widget.