ALGN· Align Technology

Dark pool · off-exchange short volume

as of 2026-11-05

ALGN's off-exchange short-volume ratio was 73.7% on 5 Nov 2026, above its 20-day average of 64.8%. Off-exchange trading was 42% of volume over the last 20 sessions. 9 sessions in the last six months had unusually large off-exchange dollar volume, the latest on 4 Nov 2026.

Short ratio (latest)

73.7%

20-day average

64.8%

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

187.99

2.52B

184.69

2.32B

181.39

2.94B

178.09

3.43B

174.79

2.76B

171.50

2.51B

168.20

2.16B

164.90

2.05B

161.60

1.50B

158.30

1.55B

155.01

0.98B

151.71

1.06B

148.41

1.20B

145.11

1.22B

141.81

1.49B

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.