So you can hover your mouse over the lines and see how much leverage is sitting there (based on the exchanges that are included in the data). Yellow means there is more leverage sitting there and green means it is not as much leverage. Purple is no leverage.

The short lines are where leverage got liquidated. The long lines that go all the way to the right are where people still have positions open.

I have been doing this with the btc chart for a couple of years now. I used to actively trade btc treasury companies (not anymore though) and I will look to see where leverage is before making a move.

Typically where the most leverage is the price gets pulled to those numbers and then once the leverage gets liquidated the price goes back to more of a "equilibrium."