PTC· PTC Inc.
Dark pool · off-exchange short volume
Short ratio (latest)
42.1%
20-day average
46.4%
Off-exchange share (20d)
38%
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
149.09
1.06B
146.47
1.62B
143.86
2.48B
141.24
2.56B
138.63
1.93B
136.01
1.87B
133.40
1.55B
130.78
1.74B
128.16
1.67B
125.55
1.96B
122.93
1.66B
120.32
1.50B
117.70
1.45B
115.09
1.72B
112.47
1.09B
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.