PCAR
Dark pool — off-exchange short volume
Short ratio (latest)
50.8%
20-day average
58.6%
Off-exchange share (20d)
34%
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
130.80
0.14B
128.51
0.80B
126.21
2.66B
123.92
1.75B
121.62
1.46B
119.33
1.45B
117.03
2.20B
114.74
1.82B
112.45
2.05B
110.15
3.20B
107.86
2.71B
105.56
2.59B
103.27
2.90B
100.97
3.92B
98.68
5.35B
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.