Will the highest temperature in Helsinki be 9°C on October 30?
2 of 3 top Polymarket traders hold Yes (67%) · Yes at 98¢ · $74 held · ended Oct 30
⚖️
Neutral
Yes
3
Yes 67%
$73.51
$9.34
Research grade
NeutralYes at 98%
No measured edge, which here means a loss: the plain consensus (5+ holders, 60 %+, held to resolution) lost −3.0 % a trade after costs out of sample in the full-year test (n 86,296, 95 % CI −3.6 to −2.4 %).
- Side priced over 95¢Full year, out of sample: 0.90–0.95 −0.2 % a trade (n 12,989, 95 % CI −0.6 to +0.3); above 95¢ little is left to win and the tests stop at 0.95.
- Fewer than 5 holdersEvery backtest needed 5+ holders; with fewer nothing was measured.
The rules come from our Oct 22 2026 backtest (one entry per market, held to resolution, after a 1¢ half-spread and Polymarket's taker fees). Our full-year test without hindsight (Oct 26 2026) found none of them profitable out of sample, and the plain consensus lost −3.0 % a trade. The grade describes the market; it is not a forecast, not an edge and not advice.
Smart Money Signal
2 of 3 top traders (67%)1 holds an outcome priced under 50%3 small positions dimmed (<$100 invested)
Outcome Probabilities
Smart Money Breakdown by Outcome
| Trader | Position | Invested | Value | PnL | Record |
|---|---|---|---|---|---|
GH ghorrock<$100 | Yesavg 88.8¢ | $59.86 | $53.89 | +$5.91 | 57% 13599-10421 (24020) |
HE HellYeahTrader<$100 | Yesavg 72¢ | $14.41 | $19.56 | +$3.5 | 55% 369-296 (665) |
CB Cb94C437EA5e6f088c6c0C143c592ab8EFBedCTR<$100 | Noavg 5¢ | $0.13 | $0.06 | -$0.07 | 53% 6479-5682 (12161) |
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EV Calculator
Consensus % is how many tracked traders hold a side, not a win probability.
97.8¢ price + 1.0¢ spread + 0.1¢ fee (Other / General 5%). Win more often than this and the bet pays.
A market order pays the taker fee and crosses the spread (assumed 1.0¢); a limit order pays no fee but may not fill. The fee category is a guess from the title.