# Historical Trends

## &#x20;📆 What are historical trends ?&#x20;

The historical trends allows you to see over a given timeline the evolution of your respondent answers.&#x20;

Using historical trends you can see how your respondent answers evolves over a period of time in days, months or years.  This way you can compare key metrics like NPS, rating scores and be able to spot any major changes during a period of time. &#x20;

<figure><img src="/files/gMwvIYul53N7yRc6cxk7" alt=""><figcaption></figcaption></figure>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.ngsurvey.com/form-management/reports/historical-trends.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
