```text
usage: rolling [-l N_LENGTH] [--export {csv,json,xlsx}] [-h]
```

Rolling mean and std deviation

<img size="1400" alt="Standard Deviation" src="https://user-images.githubusercontent.com/85772166/143656913-27d6923e-1814-485c-9e3c-aa17b1da0b89.png">

To learn more on this topic, visit: https://www.mathsisfun.com/data/standard-normal-distribution.html

```
optional arguments:
  -l N_LENGTH, --length N_LENGTH
                        Window length (default: 14)
  --export {csv,json,xlsx}
                        Export dataframe data to csv,json,xlsx file (default: )
  -h, --help            show this help message (default: False)
```

<img size="1400" alt="Feature Screenshot - rolling" src="https://user-images.githubusercontent.com/25267873/112729908-75093900-8f26-11eb-9056-16bac2f54386.png">