One Piece TCG · Market intelligence
Most One Piece cards fell. Our buy list finished higher.
Bought right before the drop. Sold right before the pop. We built the tool that ends it: a daily buy, hold, or sell verdict on every card, tested on 2.5 years of real prices, graded in public where we can't hide our misses.
1,482 verdicts fired on today's board. Free sign-in, takes 10 seconds. No card, no trial clock. The track record is public either way.
AI world first
Plug the Ledger into Claude or ChatGPT
The first TCG verdicts with a native AI connector. Your assistant answers with our live prices, daily verdicts, PSA populations, and real sold volume, straight from the Ledger's database. See how it works →
"When should I buy?"
Open any card. Read the verdict and the record behind it. Zero gut feel in the chain.
3 of 4 buy calls finished higher within 8 weeks, averaging +24.8%
"When should I sell?"
Sell Watch flags weakness the day it shows. Profit Watch tells you when a card you own is hot enough to exit.
Cards we warned on kept falling, around a further 6%
"What's it actually worth?"
US, Japan, and Europe on one page. Click real eBay solds. Check PSA, CGC, and BGS populations.
7,000+ cards and boxes with daily verdicts, and 15,000+ prices tracked across the US, Japan, and Europe in 9 currencies
Trust the calls
A track record nobody can edit. Not even us.
Every call is stamped in public the day it fires and graded at 4 and 8 weeks. Winners and losers stay on the board forever. Ask any other card site for their miss list.
Inspect the record →Numbers we're proud to sign
Every number below comes from replaying our rules over 2.5 years of real recorded prices, tested on data the rules had never seen. Every one is checkable on the Ledger.
84%
$200+ buy calls higher 8 weeks on
+21%
Typical gain on those calls
75–84%
Winning record at every price level, $5 promos to $500 chases
-6.1%
What SELL WATCH cards did next
For context: the typical card lost money over the same windows. Observations, not financial advice.
Other apps charge you to see prices.
We only charge to act first.
The going rate in this hobby is $8 to $13 a month for price charts. Here, the prices, the daily verdicts, and our entire graded track record are free. Premium exists for one thing: today's calls with the reasoning, the moment they fire.
| Grand Line LedgerFree | Grand Line LedgerPremium | Typical app$8–13/mo | |
|---|---|---|---|
| Prices & charts, every card and box | ✓ | ✓ | —paywalled |
| Real eBay solds you can verify | ✓ | ✓ | — |
| Daily buy / hold / sell verdicts | ✓a day behind | ✓same day + reasoning | — |
| Public track record grading every call | ✓ | ✓ | —nobody has one |
| PSA / CGC / BGS pops + Japan market | — | ✓ | —partial |
| Collection tracker, backdated value | ✓50 items | ✓unlimited | —capped |
Based on published pricing of popular TCG tracking apps, July 2026. We name no names; go window-shopping and check.
Premium
US$6.99US$9.99 / month
Switch to yearly and get 2 months free.
Try everything free for 7 days. Cancel before day 7 and pay nothing.
Captain Premium + your AI
US$13.99US$19.99 / month
Switch to yearly and get 2 months free.
Try everything free for 7 days. Cancel before day 7 and pay nothing.
See what others can't
Data nobody else in One Piece puts on one page.
Check PSA, CGC, and BGS populations with gem rates. Click real eBay solds. Flip any card to its Japanese printing with live dealer prices. And read the Scarcity Score: our daily estimate of supply, because Bandai will never tell you.
Pick a card and dig in →
Find today's plays
Where to look today, ranked by what actually worked.
Open the Signal Book each morning and get the day's buys with each pattern's real record printed on it. Strategy Fit then matches every card to how you play: quick flip, steady hold, or grading play.
Open today's radar →The record
Numbers we're proud to sign
In-house formulas. 2.5 years of real prices. Re-tested every month. The recipe stays in the vault; the results never do.
Backtested against 2.5 years of real recorded prices, every flag counted: winners and losers. The typical High Conviction call never traded below its flag price at all. Past results never guarantee the future, so the live ledger grades every new call in public. Observations, not financial advice; the ledger exists so you can judge them.
Protect what you hold
Point the playbook at your own binder.
Add your cards and see a year of value history instantly, because we already recorded it. Then our verdicts run across your holdings: what's working, what's flashing a warning, and what's hot enough to take profit.
Start your collection free
Card scannerBeta
Point your camera. Get the verdict.
Rip a pack. Point your phone. Get the match, the live value, and today's verdict, English or Japanese print, foils included. Save the whole haul to your collection in one tap.
Join free to try it first →Verdicts in your AI. A TCG first.
Ask your AI the market.
Others sell raw prices to developers. We're the first to put tested buy/hold/sell verdicts in your AI, and the only ones where any member can connect Claude or ChatGPT in one click, no sales calls. Prices, verdicts, populations, and real sold volume, from our database. Included with the Captain tier.
See how it works →Your key · your account · rate-limited and revocable any time
The Ledger in your pocket
The Android app is live on Google Play, and the iOS app is next in the dock. Same live board, native scanner, push alerts on your watchlist.
Coming soon on the
App Store
Get it on
Google Play
What's inside
The full toolkit. Start free in 10 seconds.
Plug the Ledger into your AITCG first
The first backtested TCG verdicts with a native AI connector (MCP), self-serve in one click. Add us to Claude or ChatGPT and ask the One Piece market directly: live prices, verdicts, populations, and sold volume, from our database. Included with the Captain tier.
Daily verdicts on 6,500+ products
Every card, box, and tin gets a stamp every day: ACCUMULATE, HOLD, SELL WATCH, or REBOUND WATCH. Backtested against 2.5 years of real prices before a single call went live.
A track record nobody can edit
Every call is logged the day it fires and graded automatically at 4 and 8 weeks. We cannot delete our misses. If the playbook stops working, the scoreboard says so first.
Three markets, one card
US market prices and sold comps, European near-mint prices, and live Japanese dealer quotes with buyback. Flip any card page between the English and Japanese printing.
Ledger Lens on your collection
Point the playbook at your own cards: see which holdings are on buy calls, run keep-or-sell scenarios on the warnings, and catch cards running hot enough to take profit.
Collection value, backdated
Add your binder and instantly see its value curve over the past year. No waiting for history to build, because we already recorded it. Snapshotted daily from then on.
Scarcity Score
How hard a card really is to find, from PSA, CGC, and BGS graded populations (English and Japanese prints scored separately) plus live market supply. Updated daily.
Sold sales archive
Real completed sales with links to the actual listings, searchable across the whole game. Prices stay in our record forever; verify any number we publish.
Radar and watchlists
The daily short-list of movers and setups worth attention, plus watchlist alerts so the cards you care about tell you when something changes.
Every card gets a stamp. Every stamp gets a reason.
No jargon and no black box. Open any card and read exactly why it carries the verdict it does, in plain English.
An established climb still in motion, qualified against the version of the pattern our testing says actually pays: premium strength, or cheaper cards with room to run below their peak.
Falling hard, or a big run rolling over. Historically these kept falling more often than not. If selling was on your mind, this is the flag.
eBay listings drying up while the trend holds and the price hasn't spiked yet. Rare, and the classic setup before a move.
Washed out and just turning upward with the panic cooling. Speculative by design: small positions, eyes open.
Everything else gets HOLD: no signal worth acting on, and we say so rather than inventing one.
Live from today's board: the biggest swing
Sabo
This is the board working in real time: price history, eBay floor, PSA population, and the rule log explaining the stamp, all one click deep.
See the full breakdown →Built for how collectors actually play it
The full catalog
Every set, promo, pack, tin, and gift box. Singles and sealed, English and Japanese populations, updated daily.
The Radar
A daily mispricing scan: below-market eBay floors, grading plays where PSA 10 prices dwarf raw prices, and demand divergences.
Your portfolio, briefed
Track your collection and get plain-English readings on what you hold: what's running, what's rolling over, and what to do about it.
Signals tuned to you
Flipper, sealed investor, grader, or pure collector. Tell us once and the board reorders itself around how you play.
AUD & USD native
Prices, charts, and analyst notes in your currency. Built in Australia, fluent in both markets.
A public track record
The Signal Ledger logs every call the day it fires and grades it automatically at 4 and 8 weeks. We can't edit it. That's the point.
From the ledger desk
All articles →
Two Championship Finals a Season Now, and OP-17's Leaders Are Entering the First One Underwater
Bandai's 26-27 season now runs two Championship Finals instead of one, starting with Europe on September 5 and North America on September 18, and all six OP-17 Super Leader alt arts are stamped SELL_WATCH heading into it.
Sep 1, 2026
This Card Nearly Tripled in a Week, and Our System Still Says Wait
Saint Shalria rocketed up more than 190% in seven days, but the board still won't call it a buy, and that discipline is worth understanding.
Sep 1, 2026The first OP-17 weekend of real competition came and went. Nothing caught a bid.
OP-17 hit shelves on 28 August and the first big North American events ran the next day. Of the 160 OP-17 singles we track, 155 fell over that window, a median of 59.4 percent. Sealed, which had been the one exception, rolled over too.
Aug 31, 2026The market moves every morning. So do we.
Fresh prices, supply counts, and populations before breakfast. New stamps on the board every day, and a strategy that re-tests itself every month. One free sign-in puts the whole deck in your hands:
The data play is the foundation. The toolkit is the reason you'll open it every day.
Get on the board freeFree Google sign-in, takes 10 seconds. No card, no trial clock. See pricing