Marketplace Responsibilities
CardTrader is primary for inventory, seller depth, listings, and marketplace supply. TCGplayer is primary for condition-aware pricing, SKU pricing, and product IDs.
Cardmarket is used for EUR market context and cross-market comparison where mapping is available. Card Kingdom is validation only for retail and buylist comparison.
Stored History
NeoCardAlpha uses stored price snapshots, inventory snapshots, Trend Intelligence reports, and exact-print anchors. Historical trend content is never rewritten to make an earlier signal appear more accurate.
Trend Intelligence preserves the price, inventory, seller depth, Pricing Confidence, and source state that existed when a trend was first published when reliable history exists.