Well. YOu have different levels of potential. On the basic level, you have low(0 - 6 points) Avg: 7 - 20 points and High: 21+ points. (Some might argue the specific cutoffs, but somethign like that)
Using scouting reports you get messages that can clue you in to more nuance: The Low low and high low are not that relevant - the entire category has only six points of play. But among high you have the messages indicating a 'low high' - 21 - 27 points. . .and a HIGH High which is 28 or more. . sometimes ALLOT more points of improvement.