> ## Documentation Index
> Fetch the complete documentation index at: https://otakusolutions.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Charts

> Visualize trends and patterns in Montgomery's data with interactive charts.

<Frame caption="Interactive charts showing trends and patterns across Montgomery's datasets.">
  <img src="https://mintcdn.com/otakusolutions/FOF9Ash-8JM0rAsn/images/feature-charts.png?fit=max&auto=format&n=FOF9Ash-8JM0rAsn&q=85&s=8a2ba6eda2a0fa9affe63f560460181b" alt="Charts view" width="1440" height="900" data-path="images/feature-charts.png" />
</Frame>

## Overview

The Chart tab in each portal provides interactive data visualizations powered by Recharts. Charts show trends, distributions, and patterns across Montgomery's datasets.

## Features

### Interactive Tooltips

Hover over any data point to see exact values in a tooltip. Tooltips show the data label, value, and any relevant context.

### Year Filter Integration

Charts respond to the global [Year Filter](/features/year-filter). Adjust the date range to focus on specific time periods — useful for comparing pre-pandemic vs. post-pandemic trends.

### Portal-Specific Visualizations

Each portal shows charts relevant to its audience:

| Portal         | Chart Focus                                        |
| -------------- | -------------------------------------------------- |
| **Resident**   | 311 request trends by category and status          |
| **Business**   | Permit and license activity over time              |
| **City Staff** | Infrastructure project timelines, violation trends |
| **Researcher** | Longitudinal patterns across multiple datasets     |

## Loading and Error States

Charts show skeleton loading animations while data is being fetched. If a query fails, you'll see an error message with the option to retry.