ALGN traded sideways between $172.05 and $413.20 for 2 yr 9 mo, slipped below the range, and came back to test the low in the week of 10 Aug 2025.
A stock moves sideways between a floor (the range low) and a ceiling (the range high) for a long time. Then it drops below the floor, fails to climb back in, and returns to test that low again. Traders also call this a spring. Some springs mark the end of a decline; many don't.
On the chart, each candle is one week. The purple lines are the range the signal came from, and the green Retest label marks the week RangeStocks flagged. Tick “Show past sideways ranges” to see earlier ranges.
Gold dashed bands mark earlier sideways ranges, from their first swing to where they broke. Pick a range in the table below to zoom the chart to it.
| Range | Started | Ended | Outcome | Retests (week of) |
|---|---|---|---|---|
| 30 Oct 2022 | Still open | — | 10 Aug 2025 | |
| 9 May 2021 | 28 Aug 2022 · 1 yr 4 mo | Broke below the range at $234.01 | — | |
| 25 Aug 2019 | 1 Aug 2021 · 1 yr 11 mo | Broke above the range at $714.15 | — |
All NASDAQ stocks with weekly retest patterns →
Past patterns don't predict future price moves. This page shows what an automated algorithm detected and is not financial advice. Read the disclaimer.