Do you realize that those variables ( bid sum/ask sum & price; bid sum & ask sum) are displayed in those charts taking into account their own relative highest and lowest points in a given timeframe, and thus them intersecting on the chart is just arbitrary and meaningless, right?
In the "Bid sum/Ask skum & Price" chart, both graphs are in USD/BTC and both graphs use the same scale. That's not arbitrary and meaningless.
Sure, I typed too fast and I incorrectly included the Bid sum/Ask sum & price chart. But the fact that the bid sum and ask sum crosses on a chart is 100% arbitrary and meaningless, do you agree?