> ## Documentation Index
> Fetch the complete documentation index at: https://zestify-docs.geticonicapps.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Trend Chart

> The Trend chart plots a chosen metric over your selected date range, with period-over-period comparison available on paid plans.

Below the summary metrics, the **Trend** chart plots one metric over time for your selected date range.

## **Choosing a Metric**

Use the dropdown at the top right of the chart (for example, **Emails**) to switch which metric the chart plots. The x-axis shows the days in your selected date range, and a caption underneath confirms what's being shown — for example, "Showing emails over the selected period."

## **Period Comparison**

The **Upgrade for period compare** link next to the metric dropdown shows that comparing the current period against the previous one (for example, this week vs. last week) is a feature unlocked by upgrading your plan. See [Analytics by Plan](/analytics/analytics-by-plan).