CBOE
Dark pool — off-exchange short volume
Short ratio (latest)
53.4%
20-day average
55.3%
Off-exchange share (20d)
39%
Darkpool density
big day, short ratio above trendbelow trendbubble size = how unusual ($vol z-score)
Last ~6 months. Bubbles mark days of unusually large off-exchange dollar volume (≥1.5σ vs the trailing 60 days). Daily resolution — not print-level data.
Darkpool levels ±15% of spot, since 2018-10-01
339.63
0.52B
333.67
0.26B
327.71
0.25B
321.75
0.18B
315.80
0.16B
309.84
0.14B
303.88
1.16B
297.92
1.56B
291.96
1.17B
286.00
1.47B
280.04
1.44B
274.09
1.20B
268.13
0.93B
262.17
0.89B
256.21
1.36B
Historical off-exchange $ volume at price: each day's volume spread across that day's range, summed over the full FINRA history. Heavy shelves often act as support/resistance magnets. Amber row = spot's bin.
Off-exchange short-volume ratio
short ratio (20d, right) daily off-exchange share (left)
FINRA daily TRF data, last 2 years. A persistently HIGH short ratio is mostly passive market-maker liquidity provision (commonly read as accumulation pressure) — not naively bearish.