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
0.0244
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
6.1pp
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
40–60%149%100%+51pp
75–90%182%100%+18pp
90–100%10100%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
$201
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 $201 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 $2.1K across 12 positions, with $0 of entry fees paid.

MarketPaidResultSizeP&L
Will Lewis Hamilton be the 2025 Drivers Champion? — No0.9990won12$0
Will Trump visit the Western Wall by October 31? — No0.9980won112$0
Will the LA Clippers win the 2025 NBA Finals? — No0.9810won4$0
Will Lee Jun-seok be elected the next president of South Korea? — No0.9940won3$0
Will the Giants win Super Bowl 2025? — No0.9980won2,003$4
Will the Titans win Super Bowl 2025? — No0.9980won2,005$4
Will 'Furiosa: A Mad Max Saga' gross most in 2024? — No0.9990won121$0
Will any other Republican Politician win the 2024 US Presidential Election? — No0.9960won2,095$8
Will Robert F. Kennedy Jr. win the 2024 US Presidential Election? — No0.9990won1,992$2
Will Nikki Haley win the 2024 US Presidential Election? — No0.9990won1,994$2
Will Donald Trump win the 2024 US Presidential Election? — Yes0.4890won4,084$2.1K
Will Liverpool win the UEFA Champions League? — No0.8240won7$1

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 →