OPMT Blog
Weekly One Piece TCG market analysis, set reviews and investing guides
Should You Buy at Release, or Wait? We Tracked Two Sets From Day One
Every collector says "wait for prices to settle." We measured it. OP16 is down 29% seven weeks after release while the rest of the market rose 3%. OP15, four months in, shows where the bottom is — and which cards never come back.
Read article →The One Piece TCG Market in July 2026 — Monthly Report
After June's +16.4% surge, the tracked One Piece market cooled to +5.7% in July. June's biggest winner mean-reverted, money rotated up-set into OP13 and OP11 chase cards, and all the liquidity moved to the new OP16 set.
Read article →The Character Popularity Effect: Do Luffy Cards Really Hold Value Better?
We measured 15 weeks of prices for 3,036 cards against the official 2021 popularity poll. The more popular the character, the higher the median gain — and the smaller the chance of losing money. Luffy is in a league of his own.
Read article →The One Piece TCG Market in June 2026 — Monthly Report
Our first monthly market report: the tracked One Piece card market gained 16.4% in June. Set-by-set performance, the biggest gainers and losers, and where the liquidity actually was.
Read article →How to Spot Hot Deals? 30 Days of Data, and What Buying All of Them Would Have Returned
We analysed every card featured on OPMT Hot Deals between 7 June and 7 July 2026: the biggest gainers, the losers, and what buying all 50 featured cards every single day would have returned.
Read article →How OPMT Scores Work: LT, ST and MT Explained
A transparent look at the three scoring algorithms behind OPMT — what goes into the Long-Term, Short-Term and Medium-Term scores, at what weight, and why.
Read article →