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PENPenumbra Inc

NYSEDaily chart
Range low retest · 1 Nov 2023

PEN slipped below its $243.15 – $310.51 range and came back to test the low on 1 Nov 2023.

Range low
$243.15
support
Range high
$310.51
28% above the low
In the range since
Jul 2023
3 mo
Close on retest day
$194.06
20% below the range low
  • Previous range $246.45 – $308.99 lasted 9 mo and broke upward at $362.41.
  • 7 sideways ranges found since 2022.
What is a range retest, and how do I read the chart?

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 trading day. The purple lines are the range the signal came from, and the green Retest label marks the day RangeStocks flagged. Tick “Show past sideways ranges” to see earlier ranges.

Daily chart

Sideways range history

RangeStartedEndedOutcomeRetests
13 Jan 2026Still open——
7 Apr 202521 Jan 2026 · 9 moBroke above the range at $362.41—
31 Jul 202422 Jan 2025 · 6 moBroke above the range at $277.89—
31 Jul 202310 Nov 2023 · 3 moBroke below the range at $180.931 Nov 2023
27 Dec 202212 May 2023 · 4 moBroke above the range at $324.38—
1 Sept 20228 Feb 2023 · 5 moBroke above the range at $269.00—
12 Jan 202224 May 2022 · 4 moBroke below the range at $134.60—

Retest signals

  • 1 Nov 2023 · 3 mo into the range

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Past patterns don't predict future price moves. This page shows what an automated algorithm detected and is not financial advice. Read the disclaimer.