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
0.0000
across 12 resolved positions · lower is better
Skill vs own base rate
n/a
beating a trader who only knew how often they win
Calibration error
0.2pp
average gap between price paid and what happened
Win rate
100%
12 of 12 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
90–100%12100%100%+0pp

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
$125
1 open position
Largest position
100%
share of open capital in one contract
Half the book
1
position holds half the exposure
Unrealised
$1
against $125 of open value

100% 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 $33 across 12 positions, with $0 of entry fees paid.

MarketPaidResultSizeP&L
Will the Brooklyn Nets win the 2026 NBA Finals? — No0.9990won118$0
Will Bournemouth win the 2025–26 English Premier League? — No0.9990won118$0
Will Jurassic World: Rebirth be the top grossing movie of 2025? — No0.9960won19$0
Will the Washington Nationals win the 2025 World Series? — No0.9980won7$0
Wolverhampton Wanderers win the Premier League? — No0.9960won10$0
Will the Panthers win Super Bowl 2025? — No0.9970won3,640$11
Will the Browns win Super Bowl 2025? — No0.9970won2,773$8
Will the Titans win Super Bowl 2025? — No0.9970won893$3
Will the Raiders win Super Bowl 2025? — No0.9970won1,792$5
Will 'Furiosa: A Mad Max Saga' gross most in 2024? — No0.9990won937$1
Will 'Joker 2' gross most in 2024? — No0.9990won2,746$3
Will 'Despicable Me 4' gross most in 2024? — No0.9990won1,834$2

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 →