Description
This extension replaces the default Cardmarket chart with improved price and availability charts that become more accurate and more useful as the community grows.
What does it show?
📈 7-day average price (AVG7) for smoother price trends
📦 Available item count over time
⏱️ Multiple time ranges: 30 days, 1 year, max
Historical data on Cardmarket is limited.
This extension improves charts by collecting anonymized, aggregated market data contributed by users.
➡️ The more users participate, the better and more complete the charts become for everyone.
Optional features (recommended)
✅ Community data sharing – helps build better historical charts
✅ Random fetch – automatically collects live market data in the background while browsing
Both features are opt-in and can be enabled or disabled at any time.
Privacy-friendly by design
-No accounts required
-No tracking
-No personal data collected
-Only product-related numeric data (prices and availability)
Reviews
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Permissions (2)
Permissions
scriptingℹ Can inject scripts into web pages storageℹ Can store data locally in your browser
Details
| Version | 0.2.5 |
| Updated | Jan 27, 2026 |
| Size | 110KiB |
| First Seen | Mar 22, 2026 |
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