MLM Dark Pool — Off-Exchange & Short Volume

Market/Dark Pool/MLM

MLM· Martin Marietta Materials

Dark pool · off-exchange short volume

Open interest GEX Full dossier

Short ratio (latest)

68.7%

20-day average

57.1%

Off-exchange share (20d)

44%

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

581.35

4.35B

571.16

4.28B

560.96

3.99B

550.76

4.57B

540.56

5.30B

530.36

5.21B

520.16

2.77B

509.96

2.31B

499.76

1.62B

489.56

1.82B

479.36

1.60B

469.16

1.16B

458.96

1.27B

448.76

2.01B

438.57

1.24B

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.