You could assign the bid a tone and the ask a different tone, and just have it play with a gradient on the price axis. It would be another representation of price besides a visual image. I haven't seen any software do this yet.
If price is on the bid, tone persists, as size dwindles tone drops off and as size is added tone picks up. The ask would have a totally different assigned tone and same drop off and pick ups. Every trade at the bid or ask would just be a beat of that tone.
Isn't trading hard enough?
Isn't trading hard enough?