X time →
Y price · asks ↑ / bids ↓
Z volume depth
X time →
Y price · bids below mid / asks above
colour volume intensity
X order lifetime →
Y ticks from mid
Z volume · filled / cancelled
spoke firm (MPID)
ring ask ↑ / bid ↓
length resting volume
wedge one firm, plus ANONYMOUS
angle share of book volume
colour stable hue per firm
X order size →
Y buy ↑ / sell ↓
curve cost · amber = unfillable
X time →
Y metric lane
line value vs rolling peak
— fps