The indicator on the bottom relies on a point system with 4,100 points as the max (because I've haven't bothered to normalize). when it stays at 4,100 points and remains elevated, the background will become pink and the barcolors will also turn pink. This is how it determines market tops. The past 2 of 3 "market tops" have been bad sell offs. Just sayin.
Another way to look at market tops is hard resistance. If price goes past it, then great! everything is peachy.
When price drops below the pink part, things go horribly wrong.