NSC

Dark pool — off-exchange short volume

GEX Back to dark pool

Short ratio (latest)

64.1%

20-day average

41.9%

Off-exchange share (20d)

36%

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

327.84

0.02B

321.65

0.54B

315.47

3.20B

309.28

1.96B

303.09

1.60B

296.91

2.02B

290.72

4.58B

284.54

5.31B

278.35

6.93B

272.17

6.16B

265.98

2.55B

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.