---
title: donchian
description: Learn about Donchian Channels, an indicator formed by upper and lower
  bands around a midrange or median band. Explore the parameters, returns, and examples.
keywords:
- Donchian Channels
- indicator
- upper band
- lower band
- moving average
- security
- N periods
- Donchian Channel
- parameters
- data
- index column
- lower length
- upper length
- offset
- returns
- examples
---


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Donchian Channels.

Three lines generated by moving average calculations that comprise an indicator
formed by upper and lower bands around a midrange or median band. The upper band
marks the highest price of a security over N periods while the lower band
marks the lowest price of a security over N periods. The area
between the upper and lower bands represents the Donchian Channel.

Parameters
----------
data : List[Data]
List of data to be used for the calculation.
index : str, optional
Index column name to use with `data`, by default "date".
lower_length : PositiveInt, optional
Number of periods for the lower band, by default 20.
upper_length : PositiveInt, optional
Number of periods for the upper band, by default 20.
offset : int, optional
Offset of the Donchian Channel, by default 0.

Returns
-------
OBBject[List[Data]]
The calculated data.

Examples
--------
```python
from openbb import obb
stock_data = obb.equity.price.historical(symbol="TSLA", start_date="2023-01-01", provider="fmp")
donchian_data = obb.technical.donchian(data=stock_data.results,lower_length=20,upper_length=20,offset=0)
```


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## Parameters

This function does not take standardized parameters.

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## Returns

This function does not return a standardized model

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