# Cover Duration

## What are Ticks?

In the Athena protocol, the duration of covers is tracked using ticks. Ticks are like markers on a timeline. They help us track the passage of time for covers and manage the pool's resources efficiently. Think of ticks as checkpoints in the life of a cover.

![Ticks Representation](https://3863230093-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0mKcKgKLEWonEmIM0cM0%2Fuploads%2Fgit-blob-9f827a09c84611cdc42ace82c68a5d48f86a5691%2Fticks.png?alt=media)

## How Ticks Relate to Cover Durations

When you purchase a cover in Athena, its duration isn't set in stone with a fixed end date. Instead, it's measured in ticks. This flexible approach allows the protocol to adapt to changing market conditions.

### Dynamic Duration

The time between ticks (called "seconds per tick") can change based on how busy the pool is:

* When the pool is less busy, ticks are further apart. This means your cover lasts longer in real time.
* When the pool is busier, ticks are closer together. Your cover might not last as long in real time, but this reflects the increased risk in the pool.

![Visualizing Seconds Per Tick Changes](https://3863230093-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0mKcKgKLEWonEmIM0cM0%2Fuploads%2Fgit-blob-b300650c533fe61020f94afb979d5646230a7f10%2Fduration.png?alt=media)

## Visualizing Cover Durations

Imagine your cover as a span on this tick timeline:

* It starts at the tick when you buy the cover.
* It ends at a future tick, determined by how many premiums you've paid.

As the pool's activity changes, you might see your cover's real-time duration stretch or shrink, but the number of ticks it spans remains the same.

![Cover Pool Tick Timeline](https://3863230093-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0mKcKgKLEWonEmIM0cM0%2Fuploads%2Fgit-blob-ca44f68cbb978f1e90824fc00025e250ffcaa14e%2Ftick-covers.png?alt=media)

## Why This Matters for Users

1. **Flexibility**: Your cover adapts to market conditions automatically.
2. **Fairness**: The system ensures that all users' covers are treated equally as pool conditions change.
3. **Transparency**: You can always see how many ticks your cover has left, giving you a clear idea of your protection status.

## Key Takeaways

* Ticks are Athena's way of measuring time for covers.
* Your cover's duration in real time can change, but its tick duration remains constant.
* This system allows Athena to balance user protection with pool health dynamically.