The first strength indicator graph looks at the cumulative strength of all the populations in your matched regions, and shows you how strong each region is in comparison with each other. This way, you not only know how strong individual populations are with the population match map, but can look at the larger picture, and know how each represented region measures up with any other regions you may have matched. A second strength indicator looks at your native region matches (in the smaller map) and simply shows you how each native region compares in strength with any other native regions you may have matched. $INOL