Did they make money?
The one every leaderboard answers, and the one most likely to be wrong: if the trade history does not reach back far enough to net the position, the “profit” is a cash flow with the opening trade missing.
Is this trader worth copying?
Every leaderboard ranks wallets by dollars made. That is the least useful of the three questions between you and a profitable copy — and the one every leaderboard reports.
Dollars per copied trade — copyability is a property of a wallet and a size, never of a wallet alone. Load Polymarket's top traders by profit
Paste a wallet, or load the leaderboard and pick the wallet at the top.
The three questions, and which two nobody asks
Is it distinguishable from variance?
Count bets, not fills. Twenty trades into one baseball game are one verdict on a trader's skill, not twenty.
The wallet at the top of Polymarket's 30-day profit leaderboard, up roughly $1m, scores 82 markets with a 90% interval on mean profit per market of about -$7.4k to +$16.0k. The record is real. It is also indistinguishable from variance, and no leaderboard says so.
Does the price still exist?
If the market moves the moment their fill prints, the edge is real for them and gone for anyone arriving afterwards. That is why the answer depends on your size as well as their record.
This page reads /v1/traders and /v1/copyability/{wallet}. It measures and records; it does not recommend positions. Read the API →