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
0.0353
across 2 resolved positions · lower is better
Skill vs own base rate
+86%
beating a trader who only knew how often they win
Calibration error
13.8pp
average gap between price paid and what happened
Win rate
50%
1 of 2 paid out

Only 2 resolved positions. Below about 8 these scores are noise rather than signal: a couple of lucky or unlucky resolutions move them entirely. Treat everything here as provisional.

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%11%0%−1pp
60–75%173%100%+27pp

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
$20.3K
5 open positions
Largest position
94%
share of open capital in one contract
Half the book
1
position holds half the exposure
Unrealised
−$19.6K
against $20.3K of open value

94% 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 $17 across 2 positions, with $185 of entry fees paid.

MarketPaidResultSizeP&L
Strait of Hormuz traffic returns to normal by July 31? — Yes0.0110lost18,182−$200
Will there be no change in Fed interest rates after the July 2026 meeting? — Yes0.7346won817$217

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 →