ISRG Dark Pool — Off-Exchange & Short Volume

Market/Dark Pool/ISRG

ISRG· Intuitive Surgical

Dark pool · off-exchange short volume

Open interest GEX Full dossier

Short ratio (latest)

63.3%

20-day average

54.5%

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

420.83

4.38B

413.45

3.56B

406.06

4.93B

398.68

6.09B

391.30

5.03B

383.92

6.20B

376.53

6.36B

369.15

5.91B

361.77

4.47B

354.38

5.76B

347.00

5.58B

339.62

4.94B

332.23

5.79B

324.85

5.14B

317.47

2.82B

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.