GLW
Dark pool — off-exchange short volume
Short ratio (latest)
50.6%
20-day average
48.4%
Off-exchange share (20d)
42%
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
190.88
4.07B
187.53
3.52B
184.18
2.90B
180.83
2.76B
177.48
3.12B
174.13
2.98B
170.78
3.22B
167.43
3.17B
164.09
2.35B
160.74
2.43B
157.39
2.34B
154.04
2.36B
150.69
2.77B
147.34
2.99B
143.99
2.68B
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.