ISRG

Dark pool — off-exchange short volume

GEX Back to dark pool

Short ratio (latest)

43.0%

20-day average

45.1%

Off-exchange share (20d)

41%

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

472.03

8.79B

463.75

7.06B

455.47

7.71B

447.18

8.45B

438.90

9.41B

430.62

5.18B

422.34

3.98B

414.06

1.86B

405.78

1.79B

397.50

2.96B

389.22

4.77B

380.94

4.97B

372.65

3.67B

364.37

2.67B

356.09

2.90B

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.