---
title: rolling
description: The document displays a brief overview about rolling mean and standard
  deviation. It includes usage explanation, parameters description with special emphasis
  on window length and an illustrative diagram.
keywords:
- Rolling mean
- Standard deviation
- Usage
- Parameters
- n_window
- Window length
---

import HeadTitle from '@site/src/components/General/HeadTitle.tsx';

<HeadTitle title="stocks/qa/rolling - Reference | OpenBB Terminal Docs" />

Rolling mean and std deviation

### Usage

```python
rolling [-w N_WINDOW]
```

---

## Parameters

| Name | Description | Default | Optional | Choices |
| ---- | ----------- | ------- | -------- | ------- |
| n_window | Window length | 14 | True | None |

![rolling](https://user-images.githubusercontent.com/46355364/154308175-bb244d55-a6e0-4d6e-80f4-b3937dcd8ed4.png)

---