The lower one:
Why the bidding and asking amount have negative values?
The bars indicate the
change to the bid and ask orders in the last ten minutes. When people place orders, it's positive, when people cancel orders, it's negative. The red negative bars are cancelled bids, and the green negative bars are cancelled asks (the colours are reversed for positive values).
The upper one:
What is the green and red zone stands for? Maximum and minimum price? And the pillar is the exchanging amount?
Yes. Green = maximum; red = minimum; yellow = spot; blue = volume.
Anything else you're confused about, just press the "WTF?" button in the top right.
