Several metrics are available to you within the graph view. You can hover over a particular theme to view the distribution metrics of counterparties within this theme.
Max: The top-scoring counterparty score
Q3: This measure is the score of the parties within the 75th percentile
Median: The midpoint distribution of score
Q1: This measure is the score of the parties within the 25th percentile
Min: The lowest scoring counterparty score
You can then use any of these scores in adjusting the risk appetite on the grid tab.