FFIV
Dark pool — off-exchange short volume
Short ratio (latest)
57.5%
20-day average
40.4%
Off-exchange share (20d)
42%
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
413.76
0.02B
405.95
0.20B
398.15
0.40B
390.34
0.49B
382.53
0.50B
374.73
0.18B
366.92
0.07B
359.11
0.30B
351.31
0.19B
343.50
0.38B
335.69
0.60B
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.