Price Methodology
Understand how we calculate and track card prices on CardForum.
Data Sources
Our pricing data is sourced from CardMarket, one of the largest European trading card marketplaces. We collect listing data multiple times per day to ensure accuracy and timeliness.
Data Filtering
Raw listing data goes through several filtering stages to ensure quality:
- Removal of outlier prices (extremely high or low listings)
- Filtering of damaged or incomplete listings
- Exclusion of pre-sale and pre-order listings
- Minimum listing quantity requirements
Price Calculations
We calculate several price metrics for each card variant:
Market Price
A weighted average of recent sales and current listings, designed to represent the fair market value of a card.
P10 (10th Percentile)
The price below which 10% of listings fall. Useful for finding deals.
Median
The middle price when all listings are sorted. Less affected by outliers.
P75 (75th Percentile)
The price below which 75% of listings fall. Indicates the upper market range.
Update Frequency
Prices are updated daily. High-volume cards may be updated more frequently. Historical price data is retained indefinitely to provide long-term trends and analysis.
Disclaimer
While we strive for accuracy, our prices are estimates based on available market data. Actual transaction prices may vary. This data should not be used as the sole basis for buying or selling decisions. We are not responsible for any financial decisions made based on our pricing data.