Wakeloom
The usual traps when copying the leaderboard: the top spot came from one big bet, unrealized gains are counted in the rank, the board mixes in market makers and wash traders, and you always order later than they did, after the price has moved. Some traps are on your side: wrong position sizing, or missing their exit. Here's how to spot and avoid each.
The #1 spot came from one big bet
Profit-sorted boards love the person who hit one large event. Maybe it was a great call, maybe luck; one trade can't tell you which.
Check profit concentration. How much of the profit comes from the biggest event? Take it out; is the rest still positive? If nearly all of it comes from one event, that rank is hard to repeat.
Unrealized gains are in the rank
Some boards mark open positions to the current price. Someone holding a big position that moves their way climbs the board; when the price comes back, they drop. Follow them at #1 and you may be following a position that hasn't resolved.
Look at realized and unrealized PnL separately, and at the number of resolved markets (counted over full history). Many resolved markets plus positive realized PnL is a sturdier record.
You can't copy market makers
Some wallets quote both sides of a market and earn the spread at their resting prices. Volume is high and returns can look steady.
You can't follow them. By the time you see their fill, you're taking someone else's quote, not getting their price, and you can lose on the spread even when the direction is right. Leave wallets with a high share of two-sided quoting off your copy list. On Wakeloom, suspected market-maker addresses are not ranked. This check is still being filled in, so take a second look yourself before copying.
Wash traders' numbers are manufactured
Volume far beyond profit, or trades against itself, means volume and rank may be inflated. Big volume isn't skill. Leave these off too.
Wakeloom scores wallets against thresholds such as profit concentration and wash trading; wallets that fail get no overall score. These checks are still being filled in, so whichever leaderboard you use, Wakeloom's included, check market making, wash trading and single-event concentration yourself. See How it works.
You always order after they do
Copying means you order after you see their fill, so there's always delay: spotting the fill, confirming, submitting.
Many Polymarket order books are thin. The price can move during that delay, and your order may eat several levels of the book, so your average price is worse than theirs. The cheaper they bought, the thinner the market and the faster they trade, the bigger the gap.
Check median hold time and order-book depth. Short holders who trade obscure markets usually show the widest gap between their results and their copiers'.
Wakeloom's paper trading fills against the live order book at the moment the leader's trade is seen, records the price gap on every trade, and skips the trade if the gap exceeds a threshold (3% by default, adjustable). It all happens on paper, with no real money. You see how much the spread eats before deciding whether to keep following. Can copy trading on Polymarket lose money to delay and slippage? Yes; see the FAQ.
Fees and costs left out
Some markets charge trading fees; check Polymarket's official documentation. The PnL on the board is theirs. Yours comes after your own fees, spread and delay. Compare numbers after costs.
Copying their position size
A drawdown a whale can absorb may be too much for you. A small slice of their capital, copied at the same dollar amount, can be a big chunk of yours.
Copy proportionally and cap each trade and each market. That matters more than finding "the best trader".
They exited and you didn't
Copy entries but not exits and your results will look nothing like theirs. They've taken profit or cut the loss; you're still holding whatever happens next.
Your copy rules should include following reductions and closes. Wakeloom's paper trading scales down or closes in proportion when the leader does. What if they close? Close too; see the FAQ.
Using a stale leaderboard
A leaderboard is a snapshot. On a board from a week ago, people may have already changed style. Check the data timestamp (as_of) first, and make sure the wallet page and the board match.
The Wakeloom leaderboard is sorted by overall score (smart_score), every page shows its as_of, and the website and app read the same data. Win rate (last 90 days) and ROI (last 90 days) are shown for reference only, not used for ranking.
Summary
A leaderboard is good for finding names and risky to copy blindly. Rule out big-bet, market-maker and wash-traded wallets, check resolved markets and drawdown, then paper-copy to see what's left after spread and costs. Wakeloom is not live yet and offers paper-trading analysis only. Results are for research only and are not investment advice. Past results don't predict future ones.