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
0.0983
across 12 resolved positions · lower is better
Skill vs own base rate
+48%
beating a trader who only knew how often they win
Calibration error
18.1pp
average gap between price paid and what happened
Win rate
75%
9 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
0–10%15%0%−5pp
10–25%116%100%+84pp
25–40%138%0%−38pp
40–60%148%0%−48pp
60–75%169%100%+31pp
90–100%798%100%+2pp

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
$1.4K
39 open positions
Largest position
27%
share of open capital in one contract
Half the book
2
positions hold half the exposure
Unrealised
−$203.5K
against $1.4K of open value

The resolved record

Every settled position, rebuilt from on-chain fills. Realised $803 across 12 positions, with $0 of entry fees paid.

MarketPaidResultSizeP&L
Will Iran close the Strait of Hormuz in 2025? — No0.9750won7,112$178
Jerome Powell out as Fed Chair in 2025? — No0.9740won21,807$567
Will MrBeast say Million / Billion 15+ times during next video? — Yes0.9900won1,771$18
Russia x Ukraine ceasefire in 2025? — Yes0.3800lost5−$2
Will Satoshi move any Bitcoin in 2025? — No0.9650won5$0
Will Microsoft be the largest company in the world by market cap on November 30? — No0.9960won497$2
Will NVIDIA be the largest company in the world by market cap on November 30? — No0.0500lost640−$32
Will Zohran Mamdani praise Donald Trump on Friday? — No0.1612won13$11
Counter-Strike: Nuclear TigeRES vs ARCRED (BO3) — ARCRED0.4802lost1,411−$678
Will Paramount Group (PSKY) beat quarterly earnings? — No0.6900won1,444$448
Will the price of Bitcoin be less than $111K on August 21 at 4PM ET? — No0.9970won26,837$81
Will Trump and Zelenskyy shake hands for between 4 and 6 seconds? — No0.9930won30,000$210

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 →