ALGN·Align Technology, Inc.

Realized volatility (21d)

30.5% 35th pct

Below its peak

-80.7%

vs 200-day average

-17.5%

Up days (1y)

49%

Align Technology, Inc. is currently running 30.5% annualised volatility over the last 21 sessions. Measured against ALGN's own 13 years of daily returns rather than a market-wide average, that is the 35th percentile — on the quiet side for this stock, against a typical reading of 36.3%. The distinction matters because a number that looks calm for one stock is turbulent for another, and the absolute figure on its own tells you neither.

ALGN is trading -80.7% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -42.5%, and the deepest was -72.9% in 2022. The current drawdown is already deeper than this stock's typical annual low point, which puts it in the part of its range where past recoveries began — and where past declines also continued.

Price sits -17.5% from its 200-day moving average. Against every other day in its history, that gap ranks at the 19th percentile — a narrower gap than it typically runs. Over the past year ALGN closed higher on 49% of sessions, and it is currently 3 sessions into a falling streak.

On October specifically: over 13 years of records, ALGN finished the month higher 7 of 13 times, with a median return of +5.1% and an average of +2.9%. Its strongest month historically has been November at +5.2% on average, its weakest September at -2.3%. Seasonality is a weak signal on its own — a decade is a small sample and regimes change — but it is a real distribution rather than a rule of thumb.

Overnight risk is measurable too: ALGN has opened more than 2% away from the prior close in 194 of 3,265 sessions (5.9% of the time), with the largest gaps running +10.3% and -11.4%. For anyone holding through an event, that rate is a better guide to overnight exposure than the intraday range.

Across the last 3 dated reports on file, ALGN moved an average of 3.0% in the session after earnings, closing higher 1 of those 3 times, with a median move of -2.2% and a largest of -4.0%.

All figures computed from 3,266 daily closes between 2013-10-07 and 2026-10-05, split-adjusted, recomputed daily. Percentiles are against ALGN's own 13-year history, not a peer group or index.