# Track **historical trends** and changes

Dig into the change history for any metric to see what has changed since your last audit, and demonstrate improvements graphically.

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## Understand the historical context

When you do a website audit you are taking a snapshot of a website at a specific point in time. But that is only half of the picture - it is almost more important to understand how it has changed over time, and what events led to its current state. Sitebulb has a range of features that help give you this historical context, so you can truly understand what you're looking at.

## Trendlines for instant understanding

Trendlines tell a story that communicates meaning instantly. You can see exactly how the data has changed over time, and the up/down values tell you the change since the most recent audit. Hover over any datapoint to see the value and timestamp from that audit.

## Dig in deeper with audit change history

If you need to dig in further or get a clearer picture of what is going on, you can simply click any datapoint to see the 'audit change history' modal - which are perfect charts to include in audit reports and help make an argument.

The change history actually works for any datapoint in the audit, including Hint values.

## Compare any two audits

To really understand what's changed between two audits, you can compare every single datapoint recorded on a single screen. This allows you to see the breadth and depth of changes simply by scrolling down the page, and take screenshots to document the changes to your clients.

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