---
title: obv
description: This page provides information on how to use the On Balance Volume (OBV)
  technical indicator source code. It covers how to plot the OBV chart and list the
  parameters and returns. This information is useful for stock market analysis.
keywords:
- OBV
- On Balance Volume
- technical indicator source code
- plot OBV chart
- parameters
- returns
- stock market analysis
---

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<HeadTitle title="ta.obv - Reference | OpenBB SDK Docs" />

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On Balance Volume

Source Code: [[link](https://github.com/OpenBB-finance/OpenBBTerminal/tree/main/openbb_terminal/common/technical_analysis/volume_model.py#L90)]

```python
openbb.ta.obv(data: pd.DataFrame)
```

---

## Parameters

| Name | Type | Description | Default | Optional |
| ---- | ---- | ----------- | ------- | -------- |
| data | pd.DataFrame | Dataframe of OHLC prices | None | False |


---

## Returns

| Type | Description |
| ---- | ----------- |
| pd.DataFrame | Dataframe with technical indicator |
---

</TabItem>
<TabItem value="view" label="Chart">

Plots OBV technical indicator

Source Code: [[link](https://github.com/OpenBB-finance/OpenBBTerminal/tree/main/openbb_terminal/common/technical_analysis/volume_view.py#L249)]

```python
openbb.ta.obv_chart(data: pd.DataFrame, symbol: str = "", export: str = "", external_axes: Optional[List[matplotlib.axes._axes.Axes]] = None)
```

---

## Parameters

| Name | Type | Description | Default | Optional |
| ---- | ---- | ----------- | ------- | -------- |
| data | pd.DataFrame | Dataframe of ohlc prices | None | False |
| symbol | str | Ticker |  | True |
| export | str | Format to export data as |  | True |
| external_axes | Optional[List[plt.Axes]] | External axes (1 axis is expected in the list), by default None | None | True |


---

## Returns

This function does not return anything

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