Guide

OPMT (One Piece Market Tracker) is a tool for tracking One Piece TCG card prices and spotting investment opportunities. It pulls real-time market data so you can see where a card's price is heading — before everyone else does.

At its core, OPMT gives you three types of scoring:

• Long-term score (shown as LT) — how good a card looks to buy and keep, from its rarity, pull rate, franchise relevance and market fundamentals.
• Deal-now score (shown as ST) — how far today's asking price sits below what the card usually sells for.
• Few-months score (shown as MT) — a blend of the two, plus the recent price trend.

Around those scores sit the deal leaderboards, a portfolio tracker, and a wishlist that lets collectors find each other — OPMT introduces a buyer to a seller through the Discord bot, and never touches payments, shipping or disputes.

Free accounts can browse the dashboard, every card page, and most of the deal views. Premium unlocks the Medium Term leaderboard, the Portfolio, Buy Price Alerts, selling on the market board, and the Custom Score builder for tuning the LT weights to your own strategy.

The LT Score is a 0–100 composite signal indicating how attractive a card is as a long-term hold. A higher score means the card has stronger fundamentals relative to its current market position. It is computed nightly and shown on every card page.

The default formula uses eight enabled categories. Each produces a 0–100 sub-score and is weighted proportionally — the weights below sum to 100.

The weights above are the website defaults. Premium users can create their own formula with custom weights — see the Custom Score section.

The ST (Short-Term) Score powers the Hot Deals page. A card qualifies as a Hot Deal when its offer book shows that buying fewer than 50 copies would push the price up 50% or more. Once it qualifies, it gets scored 0–100 across five dimensions:

Only cards priced above €0.50 are considered, and deals expire after 7 days if not refreshed by the next sync.

The MT (Medium-Term) Score blends the LT and ST scores with the card's 30-day price trend:

The trend component maps the current price against the 30-day average: ±3% counts as neutral (50), and the score saturates at ±15% (100 for a strong rise, 0 for a strong fall). Cards without enough price history fall back to a plain LT/ST average.

A card needs both a strong long-term foundation and active short-term momentum to rank highly. Cards that score well on fundamentals alone (high LT, no ST signal) or on short-term supply compression alone (high ST, weak fundamentals) will rank lower than cards where both forces are aligned.

The Medium Term tab shows the top 50 cards ranked by MT score. It is a Premium-only feature.

The scores above feed a set of ranked leaderboards. Each one answers a different question, and all of them refresh after the daily sync.

Every card detail page has a Price Increase Calculator. It walks through the live offer book to estimate exactly how many copies would need to sell before the cheapest listing reaches your target price.

Your Portfolio tracks the cards you actually own — what you paid, what they are worth now, and your profit or loss. It is free for everyone; listing your cards as open to sell is Premium.

Adding a whole collection

+ Add many on the Portfolio page has three ways in, built for vendors and anyone with more than a binder:

• Quick entry — type one card per line, e.g. OP05-119 manga x2 @900 (card number, version, quantity, price paid each).
• Import CSV — any spreadsheet, or your CardMarket stock export. Columns are matched automatically and you can correct them; CardMarket product IDs match the exact version.
• Set checklist — pick a set and tap + on every card you own. Handy after opening a box.

A card number alone doesn't say which version you have — OP05-119 exists as a base SEC, an alt art, a Manga, a Wanted Poster SP and more. Before anything is saved you see every match, and rows where we had to guess are marked Check version so you can pick the right printing.

Finding cards and gain alerts

Search, filter by set or version, and sort by value, gain or P&L; switch to the Table view for one line per card. The 📈 Up ≥ 15% since bought filter shows every holding whose market price is at least that far above the average price you paid (change the number to suit). The gain alert does the same automatically: once a day, after prices update, you get one notification (and a Discord DM) listing any card that has just crossed your threshold. It is on at +15% by default and can be changed or turned off at the top of your holdings.

Credits are the currency used to run custom score calculations on individual cards. Each time you apply your custom formula to a card, it costs 1 credit.

You can check your current credit balance on your Account page.

Your Wishlist is the list of cards you want to buy. Every card page has a market board with two tabs: collectors who want to buy the card, and collectors who are open to selling it. OPMT connects the two sides through the Discord bot — it never handles payments or shipping.

The wishlist page itself has three tabs: Cards (your own list), Active Bounties (what everyone else is hunting) and Trade requests.

Getting found by sellers

Active Bounties

The Active Bounties tab is the demand side of the market in one place: every card collectors are currently hunting, searchable by name, number or set. If you own something on that board, you can offer it to them from the card page.

Only active bounties appear there. On a Free account you pick 3 of your wishlist cards to be active (the Make active bounty / Pause buttons on each card) — the rest stay saved but paused and private until you swap them in, upgrade, or share your list. On Premium every wishlist card is an active bounty. Whenever a collector marks one of your active bounties as open to sell in their Portfolio, you get a notification (and a Discord DM if enabled).

Sharing your wishlist privately

Your wishlist is never public. If you want one specific collector to see the whole thing, create a share link on the Cards tab and send it to them however you like. Anyone who opens it sees every card you want — paused ones included — and can offer to sell them to you.

How contact works

The OPMT Discord bot brings market data and investment signals directly into your Discord server. All commands use slash syntax — type / in any channel to see the full list.

Linking your OPMT account to Discord

When you run /card [name] country:[XX] in Discord, OPMT shows the cheapest NM/English listing in your chosen country. If the seller has linked their CardMarket identity to their OPMT account, the bot will tag them directly in Discord.

How to discover your seller hash

Your seller hash only changes if CardMarket changes their internal seller ID system, which is extremely rare. Once set, you won't need to update it.