NDSN
Dark pool — off-exchange short volume
Short ratio (latest)
46.2%
20-day average
60.2%
Off-exchange share (20d)
34%
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
302.01
0.06B
296.42
0.37B
290.83
0.57B
285.23
0.80B
279.64
0.58B
274.05
0.55B
268.45
0.79B
262.86
0.73B
257.27
0.76B
251.68
1.06B
246.08
0.94B
240.49
1.10B
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.