Kramma
04

Performance audit

Am I good, and am I safe, answered for any Polymarket wallet from public data. No account, no API key, nothing to install.

Scoring a forecast requires knowing what someone believed before the outcome, which is why every other tool asks traders to log a probability against each position and then wait dozens of trades to learn anything. That step is unnecessary here. Every fill on Polymarket settles on Polygon with a price and a timestamp attached, so the record already exists: the price paid is the probability revealed.

Brier score
0.1353
across 21 resolved positions · lower is better
Skill vs own base rate
+39%
beating a trader who only knew how often they win
Calibration error
14.9pp
average gap between price paid and what happened
Win rate
33%
7 of 21 paid out

Am I good

Each row is a band of entry prices. Paid is the average price actually paid, which is the probability the wallet revealed by buying. Happened is how often those positions paid out. A well-calibrated trader has the two columns tracking each other.

Entry bandPositionsPaidHappenedGap
0–10%84%0%−4pp
10–25%516%40%+24pp
25–40%334%33%−0pp
40–60%148%0%−48pp
60–75%264%100%+36pp
75–90%280%100%+20pp

A positive gap means the wallet was under-confident in that band, it won more often than the price it paid implied. Negative means over-confident.

Am I safe

Open exposure
$4.5K
3 open positions
Largest position
69%
share of open capital in one contract
Half the book
1
position holds half the exposure
Unrealised
$1.3K
against $4.5K of open value

69% of open capital sits in a single contract. A binary settles to one dollar or to nothing, so concentration here is not a question of style: a single adverse resolution takes that share of the book with it.

The resolved record

Every settled position, rebuilt from on-chain fills. Realised −$2.9K across 21 positions, with $104 of entry fees paid.

MarketPaidResultSizeP&L
Fed Rate Hike by July 2026 Meeting? — Yes0.1002lost12,289−$1.2K
Will the Fed increase interest rates by 25 bps after the July 2026 meeting? — Yes0.0654lost30,224−$2.0K
Will Belgium win the 2026 FIFA World Cup? — Yes0.0220lost15,000−$330
Will Switzerland win the 2026 FIFA World Cup? — Yes0.0200lost15,000−$300
Will the Fed increase interest rates by 25 bps after the June 2026 meeting? — Yes0.0620lost12−$1
Bitcoin Up or Down - June 11, 8:25AM-8:30AM ET — Down0.2700won19$14
Will the Fed increase interest rates by 25+ bps after the April 2026 meeting? — Yes0.0424lost3,108−$132
Will the Reserve Bank of Australia make no change to the target for the cash rate after the March Meeting? — Yes0.4813lost170−$82
Lighter market cap (FDV) >$3B one day after launch? — Yes0.3695lost677−$250
Lighter market cap (FDV) >$1B one day after launch? — Yes0.6600won189$64
MegaETH market cap (FDV) >$1.5B one day after launch? — Yes0.1992won64$51
MegaETH market cap (FDV) >$2B one day after launch? — No0.8400won380$61
Lighter market cap (FDV) >$2B one day after launch? — Yes0.6150won650$250
Will Apple be the largest company in the world by market cap on December 31? — Yes0.0861lost2,324−$200
Will Elon Musk post 260-279 tweets from December 23 to December 30, 2025? — Yes0.0030lost2,353−$7
Will 3 Fed rate cuts happen in 2025? — Yes0.1500won2,168$1.8K
Will no Fed rate cuts happen in 2025? — No0.7600won268$64
Will 2 Fed rate cuts happen in 2025? — Yes0.3749lost533−$200
Will Bitcoin hit $107k or $109k first? — 107k0.0010lost5,973−$6
Will Logan Paul’s PSA 10 Pokémon Illustrator Sale Price be over $5 million? — No0.1300lost1,154−$150
Will Logan Paul’s PSA 10 Pokémon Illustrator Sale Price be over $6 million? — No0.2100lost1,667−$350

Swipe the table sideways to see every column.

Polymarket only. Kalshi is a regulated exchange with a private database, its per-account endpoints require the account holder's own credentials, so there is no equivalent public record to read. Method →