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91 lines
2.5 KiB
Markdown
Vendored
91 lines
2.5 KiB
Markdown
Vendored
---
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title: bbands
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description: This documentation is about the 'bbands' function in the OpenBB finance
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library. It allows users to calculate and plot Bollinger Bands for financial data,
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providing multiple parameters for customization.
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keywords:
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- OpenBB finance library
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- Bollinger Bands
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- Financial data analysis
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- Python financial tools
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- Technical analysis
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- Volatility models
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- Financial chart plotting
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---
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import HeadTitle from '@site/src/components/General/HeadTitle.tsx';
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<HeadTitle title="ta.bbands - Reference | OpenBB SDK Docs" />
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import Tabs from '@theme/Tabs';
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import TabItem from '@theme/TabItem';
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<Tabs>
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<TabItem value="model" label="Model" default>
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Calculate Bollinger Bands
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Source Code: [[link](https://github.com/OpenBB-finance/OpenBBTerminal/tree/main/openbb_terminal/common/technical_analysis/volatility_model.py#L18)]
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```python
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openbb.ta.bbands(data: pd.DataFrame, window: int = 15, n_std: float = 2, mamode: str = "ema")
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```
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---
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## Parameters
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| Name | Type | Description | Default | Optional |
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| ---- | ---- | ----------- | ------- | -------- |
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| data | pd.DataFrame | Dataframe of ohlc prices | None | False |
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| window | int | Length of window to calculate BB | 15 | True |
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| n_std | float | Number of standard deviations to show | 2 | True |
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| mamode | str | Method of calculating average | ema | True |
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---
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## Returns
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| Type | Description |
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| ---- | ----------- |
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| pd.DataFrame | Dataframe of bollinger band data |
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---
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</TabItem>
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<TabItem value="view" label="Chart">
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Plots bollinger bands
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Source Code: [[link](https://github.com/OpenBB-finance/OpenBBTerminal/tree/main/openbb_terminal/common/technical_analysis/volatility_view.py#L27)]
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```python
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openbb.ta.bbands_chart(data: pd.DataFrame, symbol: str = "", window: int = 15, n_std: float = 2, mamode: str = "sma", export: str = "", external_axes: Optional[List[matplotlib.axes._axes.Axes]] = None)
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```
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---
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## Parameters
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| Name | Type | Description | Default | Optional |
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| ---- | ---- | ----------- | ------- | -------- |
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| data | pd.DataFrame | Dataframe of ohlc prices | None | False |
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| symbol | str | Ticker symbol | | True |
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| window | int | Length of window to calculate BB | 15 | True |
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| n_std | float | Number of standard deviations to show | 2 | True |
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| mamode | str | Method of calculating average | sma | True |
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| export | str | Format of export file | | True |
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| external_axes | Optional[List[plt.Axes]] | External axes (1 axis is expected in the list), by default None | None | True |
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---
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## Returns
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This function does not return anything
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---
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</TabItem>
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</Tabs>
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