Calculate the Aroon Indicator for a given price series.

The Aroon Indicator is an oscillator that measures the strength of a trend and the likelihood of its continuation or reversal.

The formula is as follows:

\[\text{Aroon Up} = ((\text{Number of periods}) - (\text{Number of periods since highest high})) / (\text{Number of periods}) \cdot 100\]

Also known as: Aroon Up, Aroon Down, trend strength.

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Calculate the Aroon Indicator in Python

The Aroon Indicator is available in the Technicals module of the open-source Finance Toolkit. Install it with:

pip install financetoolkit -U

Then call get_aroon_indicator as shown below.

from financetoolkit import Toolkit

toolkit = Toolkit(tickers=["AAPL", "MSFT"])

toolkit.technicals.get_aroon_indicator().xs("AAPL", level=1, axis="columns")

Which returns:

Date Aroon Down Aroon Up
2026-06-18 50 64.2857
2026-06-22 57.1429 71.4286
2026-06-23 64.2857 78.5714
2026-06-24 71.4286 85.7143
2026-06-25 7.1429 92.8571
2026-06-26 14.2857 100
2026-06-29 21.4286 42.8571
2026-06-30 28.5714 50
2026-07-01 35.7143 57.1429
2026-07-02 42.8571 7.1429

Parameters

get_aroon_indicator accepts the following parameters:

  • period (str, optional): The time period to consider for historical data. Can be “daily”, “weekly”, “quarterly”, or “yearly”. Defaults to “daily”.
  • window (int, optional): The number of periods for calculating the Aroon Indicator. Defaults to 14.
  • rounding (int | None, optional): The number of decimals to round the results to. Defaults to 4.
  • growth (bool, optional): Whether to calculate the growth of the indicator values. Defaults to False.
  • lag (int | list[int], optional): The lag to use for the growth calculation.
  • standardize (bool, optional): Whether to standardize (Z-Score) the result. When combined with growth=True, standardizes the growth values instead of the raw values. Defaults to False. Defaults to 1.
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The Technicals module page introduces the module, and the sidebar lists all of its functions.

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