MPC· Marathon Petroleum
Dark pool · off-exchange short volume
Short ratio (latest)
65.8%
20-day average
60.9%
Off-exchange share (20d)
35%
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
411.77
0.04B
403.85
0.43B
395.93
1.01B
388.01
0.53B
380.09
0.51B
372.17
0.41B
364.26
1.69B
356.34
1.40B
348.42
0.34B
340.50
0.18B
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.