how to add the values of the arrows showing positional change

hi am currently running a score prediction league table where the points are inputed manually i want to add arrows showing positional change and the extent of the movement that if a team was 5th on the log and now 8th after sorting i want an arrow pointing down with -3 beside it showing the team dropped by 3 spots from the previous week and +2 if they moved up by two spots to 3rd spot on the log.