Smart money holds the underdog side

Most tracked traders hold Over, while the market favors Under (98%). 2 of 5 traders hold an outcome priced under 50%.

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

Bulls vs. Celtics: O/U 250.5

2 of 5 top Polymarket traders hold Over (40%) · Over at 1.6¢ · $3K held · ended Oct 30

Over2¢Under98¢Ended Fri, Oct 30, 2026View on Polymarket

SIGNAL

⚠️

Avoid

Over

Consensus Traders

Over 40%

1 arb excluded

Total Value

$3.3K

Combined PnL

$430.53

Smart Money Entry

47.2¢ → 1.6¢

-97% since entry · 2 traders

Research grade

AvoidOver at 2%

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.
BasketballFull year, out of sample: basketball lost −4.8 % a trade (n 1,747, 95 % CI −9.2 to +0.3); Oct 22 backtest: −12.0 % and −9.2 % in its two windows.
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.

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

Over

2 of 5 top traders (40%)Underdog side (market favors Under 98%)1 arbitrage trader dimmed2 hold an outcome priced under 50%3 small positions dimmed (<$100 invested)

Market Activity

Outcome Probabilities

Over2%

Under98%

Smart Money Breakdown by Outcome

Under3 traders

Total Value$1.6K

Total Shares2,061

Combined PnL+$503.94

Over2 traders

Total Value$1.2K

Total Shares2,613

Combined PnL-$73.41

Under — 60%Over — 40%

Trader	Position	Invested	Value	PnL	Record
CH chiefphi	Underavg 53¢	$1.1K	$1.6K	+$499.99	51% 102-98 (200)
TA takeormakeCTR	Overavg 47.2¢	$1.2K	$1.2K	-$71.19	53% 4002-3482 (7484)
UP UpTheBluesARB<$100	Underavg 47.9¢	$510.28	$552.49	+$42.21	59% 45474-31848 (77322)
└ Under leg	Underavg 47.9¢	$280.24	$325.01	+$44.77
└ Over leg	Overavg 45¢	$230.04	$227.48	-$2.56
AN Anon455<$100	Underavg 69¢	$26.71	$30.19	+$3.48	55% 2868-2301 (5169)
HRTrading<$100	Underavg 58.4¢	$22.01	$22.47	+$0.46	53% 4191-3790 (7981)
KE keeptheblueflagflyinghighCTR<$100	Overavg 44¢	$4.43	$2.22	-$2.22	48% 788-869 (1657)

chiefphi

Under

Invested

$1,059.99

Value

$1.6K

PnL

+$499.99

Record

51%

102-98 (200)

takeormakeCTR

Over

Invested

$1,229.49

Value

$1.2K

PnL

-$71.19

Record

53%

4002-3482 (7484)

UpTheBluesARB<$100

Under

Invested

$510.28

Value

$552.49

PnL

+$42.21

Record

59%

45474-31848 (77322)

Both legs:

Under$280.2447.9¢+$44.77

Over$230.0445¢-$2.56

Anon455<$100

Under

Invested

$26.71

Value

$30.19

PnL

+$3.48

Record

55%

2868-2301 (5169)

HRTrading<$100

Under

Invested

$22.01

Value

$22.47

PnL

+$0.46

Record

53%

4191-3790 (7981)

keeptheblueflagflyinghighCTR<$100

Over

Invested

$4.43

Value

$2.22

PnL

-$2.22

Record

48%

788-869 (1657)

Research grade

AvoidOver at 2%

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.
BasketballFull year, out of sample: basketball lost −4.8 % a trade (n 1,747, 95 % CI −9.2 to +0.3); Oct 22 backtest: −12.0 % and −9.2 % in its two windows.
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.

Smart Money Signal

Over

2 of 5 top traders (40%)Underdog side (market favors Under 98%)1 arbitrage trader dimmed2 hold an outcome priced under 50%3 small positions dimmed (<$100 invested)

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EV Calculator

Your estimated chance that Over wins (%)

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

Stake (USDC)

Break-even chance2.7%

1.6¢ price + 1.0¢ spread + 0.1¢ fee (Sports 5%). Win more often than this and the bet pays.

Expected Value—

Expected ROIenter your estimate

Max Profit

+$3639.37

Max Loss

-$100.00

3739.4

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.