TCG Market Tracker: How Cardlogs Tracks Card Prices Across Every Market (2026 Guide)

Cardlogs is a TCG market tracker aggregating TCGplayer, Cardmarket and eBay sold prices nightly, plus graded PSA/BGS data, box EV and portfolio tracking.

Cardlogs is a cross-source TCG market tracker: it aggregates prices nightly from TCGplayer, Cardmarket and eBay sold listings across four card games — between roughly 40,000 and just over 60,000 priced cards per source as of July 23, 2026 — and layers graded PSA/BGS prices, population data, booster box EV, market cap indexes and portfolio tracking on top. It covers One Piece TCG, Riftbound, Dragon Ball Super Card Game Fusion World (plus classic DBS), and vintage Pokemon, on the web and in iOS and Android apps.

This guide explains what a serious TCG price tracker needs to do in 2026, why single-source prices routinely mislead, and how Cardlogs' two named metrics — the Cardlogs Market Cap Index and Cardlogs Box EV — turn nightly price data into signals you can actually act on.

Why do single-source TCG prices mislead?

Because no single marketplace is "the" price. A card has at least three simultaneous prices — a US listing-derived price (TCGplayer), an EU listing-derived price (Cardmarket), and what copies actually sold for (eBay) — and the gaps between them are often enormous. A tracker that shows only one of the three shows you a third of the market.

Two failure modes matter most:

US vs EU spreads. The same card frequently trades at very different levels on the two continents, in both directions. As of July 24, 2026, Vayne - Hunter (Signature) from Riftbound's Spiritforged set sits at $1,999 on TCGplayer but only €760.62 on Cardmarket — the US market pays roughly 2.6 times the EU price. The spread runs the other way too: the Manga alternate-art Monkey.D.Luffy (OP05-119) from Awakening of the New Era shows €10,459.36 on Cardmarket against $5,700 on TCGplayer. If you only watch one source, you either overpay or undersell — and you never see the arbitrage.

Listing prices vs sold prices. Listings are what sellers hope for; sold listings are what buyers paid. The Treasure Cup Kaido (OP01-094) promo carries a $9,999.99 TCGplayer price as of July 24, 2026, while its eBay sold price is $1,739.64. A single thin listing can hold a "market price" far above where the card actually changes hands. Cross-checking listing-derived prices against eBay sold data is the fastest sanity check in the hobby, and it is built into every Cardlogs card page.

This is why Cardlogs treats every card as a three-column problem — TCGplayer, Cardmarket, eBay sold — instead of picking a winner. The columns disagree constantly, and the disagreement is itself information.

How do you track TCG card prices properly?

Cross-check at least two markets, anchor on sold prices, and watch changes rather than levels. That is the whole discipline in one sentence; here is the working version we apply to every card in the database:

1. Start from sold prices, not listings. eBay sold data is the closest thing to ground truth. If a listing-derived price is more than about double the recent sold price — like the Kaido example above — treat the listing price as aspiration, not market.
2. Compare US and EU before any buy or sell. With spreads of 1.8x–2.6x live on real cards as of July 24, 2026, checking Cardmarket against TCGplayer is often worth more than any amount of chart-reading. Currency matters too: Cardlogs converts display prices across USD, EUR, GBP, AUD, CAD and JPY so the comparison is apples to apples.
3. Track deltas, not just prices. A card at $500 tells you nothing; a card at $500 that was $380 thirty days ago tells you something. Cardlogs computes 1-day, 7-day and 30-day deltas per source on every card, and its movers views sort the whole catalog by them.
4. Value graded copies per grade. A PSA 10 and a raw copy of the same card are different assets with different prices. Any tracker that prices your graded cards at raw prices is misvaluing your collection, sometimes by multiples.
5. Judge sealed with EV, not vibes. A booster box has a computable expected value at current singles prices. Knowing it turns "is this box worth opening?" from a forum debate into arithmetic — more on this below.

Everything else on this page — the indexes, the EV engine, the graded layer — is these five habits, automated nightly.

What does Cardlogs track for One Piece TCG?

One Piece is Cardlogs' deepest catalog: as of July 23, 2026 the nightly market cap computation counted 6,511 One Piece cards priced on TCGplayer ($648,627 summed value), 11,324 on Cardmarket (€876,248) and 5,772 on eBay sold data ($762,162). English and Japanese prints are tracked as separate rows with their own prices, and sealed products — boxes, cases, anniversary sets — have their own pages, including pre-errata Romance Dawn boxes at $6,328.85.

According to Cardlogs market data, the One Piece TCG's eBay-sold index rose 11.6% in the 30 days to July 23, 2026, while its TCGplayer index rose 6.0% and its Cardmarket index 9.4% — sold prices are currently running ahead of US listings. The full breakdown, top movers and box EV table are in our One Piece TCG Market Watch — July 2026.

What does Cardlogs track for Riftbound?

Riftbound — the League of Legends TCG by Riot Games — is the youngest game Cardlogs tracks and currently the fastest-moving. The July 23, 2026 computation counted 1,017 cards on TCGplayer ($58,615), 1,083 on Cardmarket (€38,792) and 948 on eBay sold data ($42,183), spanning Origins, the Arcane Box Set, Spiritforged and Unleashed.

According to Cardlogs market data, the Riftbound market rose between 20.0% and 31.9% across sources in the 30 days to July 23, 2026 — the fastest 30-day move of the four games we track, led by Cardmarket at +31.9%. Signature cards drive the top end: Ahri - Inquisitive (Signature) sits at $4,999.89 on TCGplayer with a $8,465 PSA 10 price as of July 24, 2026. See the most expensive Riftbound cards for the live top table and Riftbound booster box EV for whether boxes are worth opening.

What does Cardlogs track for Dragon Ball Super Card Game?

Cardlogs' Dragon Ball catalog covers both Dragon Ball Super Card Game Fusion World and the classic DBS Masters sets in one corpus: 11,083 cards priced on TCGplayer ($199,710), 8,795 on Cardmarket (€175,195) and 12,044 on eBay sold data ($286,340) as of July 23, 2026. Japanese-market prices for Japanese DBS singles come from a dedicated JP shop feed — coverage most trackers simply do not have.

The live insight: the US market is repricing Dragon Ball upward — the TCGplayer index rose 10.5% in the 30 days to July 23, 2026 (Cardmarket +9.6%), while eBay sold prices were nearly flat at +0.8%. Tournament promos lead the chase list: the Championship 2025-2026 Finals Son Goku (FB04-129) trades at $2,975 on TCGplayer with an $8,000 PSA 10 as of July 24, 2026. Deeper dives: Fusion World Market Watch — July 2026 and the most expensive Fusion World cards.

What does Cardlogs track for vintage Pokemon?

The vintage Pokemon corpus is Cardlogs' largest by card count: 41,793 cards priced on TCGplayer ($2,073,697 summed value, as of July 21, 2026), 19,543 on Cardmarket (€289,007) and 21,439 on eBay sold data ($397,724), both as of July 23, 2026. It spans WOTC-era sets through the EX and early DP eras, English and Japanese, up to grails like the Pikachu Illustrator with its $16,492,000 PSA 10 price.

Vintage Pokemon is the steady one of the four: its 30-day index moves to July 23, 2026 ran +1.2% (TCGplayer, to July 21), +5.7% (Cardmarket) and +6.6% (eBay sold) — a mature market grinding up, not spiking.

The Cardlogs Market Cap Index, explained

The Cardlogs Market Cap Index is a chain-linked, same-card price index: each day's change is computed only on cards that have prices on both days, then linked into a running series seeded at 100 — so newly released cards expand the market cap but never count as price growth.

That second clause is the whole point. A naive "total market value" chart spikes every time a new set releases, because thousands of new cards suddenly enter the sum. That is catalog growth, not price growth, and trackers that conflate the two produce charts that look like rallies but mean nothing. The chain-linked index strips new entries out of the day-to-day comparison entirely: if the same cards are worth more today than yesterday, the index rises; if a set launch doubles the catalog overnight, the index does not move.

Cardlogs computes the index per game and per source (TCGplayer, Cardmarket, eBay sold) every night, alongside the raw market cap — the summed price of one copy of every tracked card. The index base is 100 on May 28, 2026, when the series started. Here is where all four games stood on July 23, 2026 (30-day index change):

*Vintage Pokemon TCGplayer figure as of July 21, 2026; all others as of July 23, 2026.

Read across a row and you see source disagreement (Dragon Ball: US listings hot, eBay sold flat). Read down a column and you see which game is actually growing — Riftbound, by a wide margin, on all three sources.

One distinction worth internalizing: the raw market cap and the index answer different questions. The cap ("what is the summed value of everything we price today?") is a size snapshot — useful for comparing games, meaningless as a time series, because it jumps whenever coverage grows. The index ("are the same cards worth more than yesterday?") is the movement metric. When a headline says a TCG market "grew 30%," always ask which of the two was measured; most of the difference between honest and misleading TCG market commentary lives in that gap.

Cardlogs Box EV, explained

Cardlogs Box EV is the expected value of opening one booster box at current singles prices: the per-pull expected value of every card in the set, weighted by pull rates, summed over the packs in a box — recomputed nightly on both TCGplayer and Cardmarket prices.

Box EV answers the only question that matters at the shelf: if I open this box, what is the average value of what comes out? As of July 24, 2026, most current One Piece expansions carry a TCGplayer Box EV between 54% and 75% of box price — Adventure on KAMI's Island (OP15) shows $194.03 EV against a $262.15 box (74%). Occasionally the math flips: the premium reprint set The Best (PRB01) shows a $1,753.90 EV against a $948.81 box — 185% of box price, a genuinely positive-EV product, with the usual caveat that a handful of chase pulls carry almost all of that expectation.

Because EV is computed per source, you also see regional asymmetries: white-bottom Romance Dawn boxes return 56% of box price at TCGplayer singles prices but 86% at Cardmarket prices, as of July 24, 2026. We publish EV analyses per game — start with Riftbound booster box EV.

How does Cardlogs handle graded cards: PSA/BGS prices and populations?

Raw prices are half the story on any card worth grading. Cardlogs tracks graded market prices per grade — PSA 10, PSA 9, BGS 10, BGS 9.5, BGS Black Label, plus CGC, SGC and TAG tops — alongside the raw price, and pairs them with PSA and BGS population reports refreshed nightly, including the full per-grade population ladder.

That pairing is what makes grading decisions quantifiable. As of July 24, 2026, the serial-numbered Monkey.D.Luffy (ST01-001) shows a $61,851.66 PSA 10 price against a $19,999 raw price — a 3.1x multiple. Vintage Pokemon's Charizard Gold Star (Delta Species) runs $65,000 in PSA 10 against $12,100 raw — 5.4x. Multiples like these, checked against how many gems actually exist in the population report, tell you whether the grading fee is an investment or a donation.

The population ladder adds the supply side that price alone hides. Two cards with identical 3x PSA 10 multiples are very different bets if one has twelve gems in existence and the other has twelve hundred — the first premium is scarcity, the second is a queue of future competitors. Cardlogs shows the full per-grade ladder (how many 10s, 9.5s, 9s and below each grader has issued) next to the per-grade prices, refreshed nightly, so the price-to-population read is one screen instead of three browser tabs. It works the same across all four games and the major graders, not just PSA on Pokemon.

How does portfolio tracking work across games?

A TCG portfolio tracker is only useful if it prices your collection the same way the market does — across sources, nightly, per game. Cardlogs portfolios work on lots: each entry records what you bought, the quantity, and your cost basis, and can hold cards from all four games side by side. Every night the portfolio is revalued against fresh prices, with graded copies valued at their per-grade price rather than the raw price.

Selling is part of the ledger, not the end of it. Marking a lot sold moves it to a Sold view with realized profit and loss, while your held positions keep tracking. The iOS and Android apps send a daily portfolio push — your total, the day's move, and which cards drove it — plus scarce event alerts for things that deserve interruption, like an all-time-high eBay sale on a card you hold. An Android home-screen widget keeps the total visible without opening the app.

Getting an existing collection in is not a retyping exercise: Cardlogs imports collection CSV exports and matches rows to its catalog automatically, and portfolio values display in your choice of six currencies (USD, EUR, GBP, AUD, CAD, JPY) using daily FX rates — useful when your buys are in euros and your sales are in dollars.

What makes Cardlogs different from other TCG price trackers?

Three things, concretely: cross-source coverage, graded depth, and computed metrics rather than raw feeds. Most trackers in this space mirror a single marketplace — usually TCGplayer — which makes them fast but blind to EU pricing and to the listing-vs-sold gap documented above. Cardlogs carries all three price columns on every card, plus Japanese retail pricing for Japanese Dragon Ball singles, where neither TCGplayer nor Cardmarket has real liquidity.

The graded layer is the second separator. Per-grade prices across PSA, BGS, CGC, SGC and TAG, paired with nightly population ladders, is coverage that price-only trackers do not attempt — and it is where the largest valuation errors hide, because a collection with graded cards priced at raw values can be off by multiples.

The third is that Cardlogs computes, rather than just displays: the Cardlogs Market Cap Index and Cardlogs Box EV are derived metrics with stated methodologies, recomputed nightly, and quotable with dates. A price feed tells you what a card costs; the derived layer tells you whether a game is growing, whether a box is worth opening, and whether a grading fee pays for itself.

What's next for Cardlogs?

Two upcoming games are on our radar for tracking, pending market launch data: the Palworld TCG (see our Palworld TCG guide) and Bandai's Naruto card game slated for 2027 (see the Naruto TCG guide). To be clear: Cardlogs does not track either yet — coverage lands once real market prices exist to aggregate.

On the content side, this post anchors a monthly Market Watch series built on the same nightly data: numbers-first recaps per game, starting with One Piece — July 2026 and Fusion World — July 2026, alongside live price-guide pages like the most expensive Riftbound cards and the most expensive Fusion World cards.

Where this data comes from

Cardlogs aggregates prices nightly from TCGplayer, Cardmarket and eBay sold listings (via PriceCharting) — as of July 23, 2026 that meant 60,404 priced cards on TCGplayer, 40,745 on Cardmarket and 40,203 on eBay sold data across One Piece TCG, Riftbound, Dragon Ball and vintage Pokemon — plus PSA and BGS graded prices and population data. Market cap figures are the summed price of one copy of every tracked card per source; index moves are chain-linked so new cards never count as growth. Japanese Dragon Ball singles add a dedicated JP retail feed. Every figure in this article carries its as-of date; nothing is estimated by hand.

Track any card, set or portfolio from this article live on Cardlogs — free on the web at cardlogs.com/optcg/home and in the iOS and Android apps.