> For the complete documentation index, see [llms.txt](https://docs.blynk.io/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.blynk.io/en/blynk.console/dashboards/device-widgets/charts.md).

# Charts

### Metrics over time, agg.

This widget provides a visual representation of historical data, making it easier to identify trends, patterns, and anomalies over time.

<figure><img src="/files/7wPkIKm5Ra0oT1rjpfrM" alt=""><figcaption><p>Chart: Metrics over time, agg.</p></figcaption></figure>

By supporting multiple data series, the widget allows you to compare different data types simultaneously, such as temperature and humidity, or energy consumption and production output. You can also compare energy consumption or any other metric by different aggregation types, e.g. Min Temperature vs Max Temperature.

**How to configure**:

1. Select datastreams. The chart supports up to 5 series.
2. Choose aggregation type. You can choose Average, Min, Max, or Sum for each data series.
3. Narrow down device selection (optional).
4. Design. Navigate to Design tab to select the chart view (line, area, column (bar), or stepline) set colors, axis and series names.

### Metric by device

This chart displays datastream values from multiple selected devices on a single chart, with each device represented by a distinct line. You can customize the chart by selecting specific devices.

The chart can display data from up to **eight** devices at the same time.

<figure><img src="/files/q23kyZc409NhwhxjfD9B" alt=""><figcaption><p>Chart: Metric by device</p></figcaption></figure>

**How to configure**:

1. Select datastream.
2. Narrow down device selection (optional).
3. Design. Navigate to Design tab to set widget title.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://docs.blynk.io/en/blynk.console/dashboards/device-widgets/charts.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.