> For the complete documentation index, see [llms.txt](https://klickanalytics.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://klickanalytics.gitbook.io/docs/tools/custom-formula.md).

# Custom Formula

Create, store, and monitor your own **custom-created formulas** or indices or benchmark by **applying a mathematical expression** to an underlying set of any global instruments in the KlickAnalytics universe.

<figure><img src="/files/BHM9OTScdWs8nBiH4poY" alt=""><figcaption></figcaption></figure>

**Filters**

You can select the date range of your choise to run your custom formula.\
\
**Formula**

* You can create an index with a mathematical expression.
* You can use +, -, \*, /  operators to construct your expression

**Historical Chart**

* View the historical chart on index.
* The chart is highly interactive. ie. You can zoom in/out.
* When hover on line chart, it will display corresponding price information.

**Sharing**&#x20;

You can share the custom index to all KlickAnalytics users too

The possibilities are endless, now our users can mix and match any global symbols to create their own expressions.

<figure><img src="/files/kODzMAo8KT8sBa8Ohpum" alt=""><figcaption></figcaption></figure>

**To access:** Click on the top menu item called Tools > [Formulas](https://www.klickanalytics.com/custom_formulas)