AH! I took another look at your posted graphic(s), and it seems as if the colored pie-chart dots (divided on an implicit horizontal basis) are derived from DOM cumulative orders on Bid and Ask.
• As hedging pushes orders in the perceived market direction (say, on the ASK when the market anticipates a climb), the dot grows more green. As total order volume grows, the dot grows bigger as well. Cumulative order volume has been a handy but way under-popularized DOM-level indicator for quite some time.
• But with either of HFT or iceberg orders, the usefulness of the DOM itself has been eroded -- making even use of cumulative BID/ASK orders a dicey proposition.
I *happen* to be more of a numbers guy, at DOM-level trading, so I'd want to see what the numbers were, not dots on a screen. But a handy thing about the dots-graphic is that they remain over time -- you could even throw a MA in there, to steady things out (and discern larger trading/traders' agendas?!?) -- things that do not remain available when working just numbers off the DOM.
Hmmmmm. (This is where having one of those little emoji things of the hand thoughtfully rubbing the chin comes in...)