> For the complete documentation index, see [llms.txt](https://docs.innofalls.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.innofalls.com/getting-started/data-fields/delta-fields.md).

# Delta Fields

The Delta fields are used to create measures deviation charts, showing the difference between two measures.

<figure><img src="/files/x0sgcognQy5sFpr9jiPC" alt="" width="132"><figcaption><p>Delta Field 1 to 3</p></figcaption></figure>

Each field must be filled with exactly two measures. For each deviation chart the chart type can be selected individually.

For more details please read [Adding Deviation Charts](/chart-types/adding-deviation-charts.md).