SBAC· SBA Communications
Dark pool · off-exchange short volume
Short ratio (latest)
50.8%
20-day average
57.9%
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
211.44
5.30B
207.73
4.55B
204.02
3.47B
200.31
2.56B
196.60
3.54B
192.89
4.56B
189.18
5.47B
185.47
4.84B
181.76
3.16B
178.05
1.70B
174.34
0.50B
170.63
0.37B
166.92
0.65B
163.21
0.33B
159.50
0.22B
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.