Will the highest temperature in London be 18°C on October 27?
2 of 3 top Polymarket traders hold No (67%) · No at 91¢ · $244 held · ends Oct 27
⚖️
Neutral
No
3
No 67%
$243.62
-$7.93
80¢ → 91¢
+14% since entry · 2 traders
Research grade
NeutralNo at 91%
No measured edge either way. The plain consensus (5+ holders, 60 %+, held to resolution) lost −4.8 % a trade after costs (n 10,051, 95 % CI −6.5 to −3.1 %).
- Fewer than 5 holdersEvery backtest needed 5+ holders; with fewer nothing was measured.
- Favourite (60–95¢)0.70–0.90 was about break-even after costs, +0.4 % a trade (n 4,327); 0.60–0.95 with 70 %+ and $10k+ +2.9 % (n 955). The consensus beats its price by 2–3 points here, about what the costs take.
Backtest of Oct 22 2026: one entry per market, held to resolution, after a 1¢ half-spread and Polymarket's taker fees. The grade never goes above “Research candidate”: no rule passed the multiple-testing check. It is not a forecast and not advice.
Smart Money Signal
2 of 3 top traders (67%)1 holds an outcome priced under 50%2 small positions dimmed (<$100 invested)
Outcome Probabilities
Smart Money Breakdown by Outcome
| Trader | Position | Invested | Value | PnL | Record |
|---|---|---|---|---|---|
HE HellYeahTrader | Noavg 80.6¢ | $142.27 | $160.62 | -$4.6 | 55% 200-166 (366) |
 Istaroth<$100 | Noavg 78.4¢ | $60.6 | $59.48 | -$0.25 | 36% 273-477 (750) |
24 241532532432CTR<$100 | Yesavg 15.8¢ | $26.6 | $23.52 | -$3.08 | 61% 1497-943 (2440) |
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EV Calculator
Consensus % is how many tracked traders hold a side, not a win probability.
91.0¢ price + 1.0¢ spread + 0.4¢ 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.