ALGN's biggest one-day moves since 2021, and what happened next
Describes the past; not a signal. Pre-licensed data — internal estimates, to be re-verified after our licensed data rebuild.
Close-to-close daily changes from 1 Apr 2021 to 9 Nov 2026 (1409 sessions). Later changes are measured from the close on the day of the move.
Biggest one-day falls
Of these 10, 4 were higher 21 sessions later · n = 10 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 31 Jul 2025 | -36.6% | +7.6% | +10.0% | +2.2% |
| 26 Oct 2023 | -24.9% | +0.9% | +13.7% | +41.9% |
| 27 Oct 2022 | -18.1% | -3.1% | +4.5% | +46.4% |
| 28 Apr 2022 | -15.5% | -6.9% | -6.6% | -7.8% |
| 27 Apr 2023 | -10.4% | -4.3% | -10.2% | +20.2% |
| 5 May 2022 | -8.7% | -8.5% | -5.2% | +3.6% |
| 21 Apr 2022 | -8.5% | -20.6% | -28.3% | -30.7% |
| 7 Sep 2023 | -7.8% | -2.4% | -16.5% | -36.4% |
| 13 Sep 2022 | -7.7% | -6.0% | -15.8% | -21.1% |
| 25 Jul 2024 | -7.7% | +1.0% | +3.5% | -8.1% |
Biggest one-day rises
Of these 9, 3 were higher 21 sessions later · n = 9 · could be chance.
| Date | One-day change | After 5 sessions | After 21 sessions | After 63 sessions |
|---|---|---|---|---|
| 2 Feb 2023 | +27.4% | -10.7% | -6.7% | -15.5% |
| 9 Apr 2025 | +14.4% | +1.3% | +10.2% | +22.6% |
| 27 Jul 2023 | +13.4% | -4.9% | -7.5% | -34.2% |
| 10 Nov 2022 | +12.5% | -0.8% | -0.7% | +65.5% |
| 11 Nov 2022 | +11.5% | -11.6% | -9.3% | +51.4% |
| 14 Dec 2023 | +11.1% | +6.6% | +1.0% | +23.0% |
| 5 Feb 2026 | +8.9% | +4.7% | -0.3% | -4.1% |
| 29 Jul 2021 | +8.9% | +3.3% | +3.7% | -10.7% |
| 4 Nov 2026 | +8.8% | pending | pending | pending |
| 16 Mar 2022 | +7.7% | +3.9% | -2.6% | -42.0% |