Smart money holds the underdog side

Most tracked traders hold Under, while the market favors Over (85%). 2 of 4 traders hold an outcome priced under 50%.

Historically, consensus on sides priced under 40¢ lost money after costs.

Vegalta Sendai vs. RB Ōmiya Ardija: O/U 2.5

2 of 4 top Polymarket traders hold Under (50%) · Under at 15¢ · $66 held · ended Oct 31

Over85¢Under15¢Ended Sat, Oct 31, 2026View on Polymarket

SIGNAL

⚠️

Avoid

Under

Consensus Traders

Under 50%

Total Value

$66.4

Combined PnL

-$60.26

Research grade

AvoidUnder at 15%

Matches a pattern that lost clearly more than the plain consensus in our tests.

Consensus side under 30¢Full year, out of sample: 0.05–0.30 lost −8.1 % a trade (n 11,568), under 0.20 −20.5 % (n 3,615). Oct 22 backtest: −29.5 % (n 1,625). The strongest effect in every test.
Spread or totalOct 22 backtest: spreads and totals −14.5 % a trade in spring (95 % CI −27 to −1), +1.5 % in October: no edge.
Consensus under 60 %Every backtest started at 60 %+ of the holders; below that nothing was measured.
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

Under

2 of 4 top traders (50%)Underdog side (market favors Over 85%)2 hold an outcome priced under 50%4 small positions dimmed (<$100 invested)

Market Activity

Outcome Probabilities

Over85%

Under15%

Smart Money Breakdown by Outcome

Under2 traders

Total Value$35.01

Total Shares233

Combined PnL-$64.87

Over2 traders

Total Value$31.39

Total Shares35

Combined PnL+$4.61

Under — 50%Over — 50%

Trader	Position	Invested	Value	PnL	Record
RN1CTR<$100	Underavg 44¢	$94.79	$32.28	-$62.51	54% 56561-48730 (105291)
TO topdogbigboi<$100	Overavg 75.9¢	$23.28	$27.14	+$3.86	49% 7885-8203 (16088)
ARTEM-DZYUBA<$100	Overavg 70¢	$3.5	$4.25	+$0.75	85% 5274-898 (6172)
HRTradingCTR<$100	Underavg 28¢	$5.09	$2.73	-$2.36	53% 4540-4093 (8633)

RN1CTR<$100

Under

Invested

$94.79

Value

$32.28

PnL

-$62.51

Record

54%

56561-48730 (105291)

topdogbigboi<$100

Over

Invested

$23.28

Value

$27.14

PnL

+$3.86

Record

49%

7885-8203 (16088)

ARTEM-DZYUBA<$100

Over

Invested

$3.5

Value

$4.25

PnL

+$0.75

Record

85%

5274-898 (6172)

HRTradingCTR<$100

Under

Invested

$5.09

Value

$2.73

PnL

-$2.36

Record

53%

4540-4093 (8633)

Research grade

AvoidUnder at 15%

Matches a pattern that lost clearly more than the plain consensus in our tests.

Consensus side under 30¢Full year, out of sample: 0.05–0.30 lost −8.1 % a trade (n 11,568), under 0.20 −20.5 % (n 3,615). Oct 22 backtest: −29.5 % (n 1,625). The strongest effect in every test.
Spread or totalOct 22 backtest: spreads and totals −14.5 % a trade in spring (95 % CI −27 to −1), +1.5 % in October: no edge.
Consensus under 60 %Every backtest started at 60 %+ of the holders; below that nothing was measured.
Fewer than 5 holdersEvery backtest needed 5+ holders; with fewer nothing was measured.

Smart Money Signal

Under

2 of 4 top traders (50%)Underdog side (market favors Over 85%)2 hold an outcome priced under 50%4 small positions dimmed (<$100 invested)

Chat

EV Calculator

Your estimated chance that Under wins (%)

Consensus % is how many tracked traders hold a side, not a win probability.

Stake (USDC)

Break-even chance16.7%

15.0¢ price + 1.0¢ spread + 0.7¢ fee (Sports 5%). Win more often than this and the bet pays.

Expected Value—

Expected ROIenter your estimate

Max Profit

+$499.81

Max Loss

-$100.00

599.8

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.