# Charts and Graphs

## Overview

Charts and graphs in Welkin provide visual representations of patient data over time. They are commonly used to track clinical metrics such as weight, blood pressure, assessment scores, or custom CDT (custom data type) values.

## Viewing Charts for a Patient

1. Open the patient profile
2. Navigate to the **Charts** or **Graphs** tab (the tab name may vary based on your configuration)
3. Select the data series or metric you want to view from the dropdown

The chart displays historical data points plotted over time, with the x-axis representing dates and the y-axis representing the metric value.

## Chart Controls

* **Date Range** – filter the chart to show data for a specific time period (last 30 days, last 90 days, custom range)
* **Data Point Selection** – if multiple metrics are available, toggle which ones to display
* **Zoom** – click and drag on the chart to zoom into a specific date range

## Data Sources for Charts

Charts pull data from:

* **Assessment responses** – scores from completed forms (e.g., PHQ-9 scores over time)
* **Custom Data Types (CDTs)** – structured data fields such as vitals, lab values, or biometric measurements
* **Encounter outcomes** – summary data captured during encounters

## Configuring Charts in Designer

Charts are configured in the Welkin Designer. Administrators and Designer users can:

* Define which data fields to chart
* Set axis labels and display formatting
* Configure chart types (line, bar, scatter)

For configuration details, see [How to Configure Charts and Graphs (Designer)](https://github.com/welkincloud-io/welkin-docs/blob/master/kb/designer/charts-graphs-how-to-configure.md).

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