Line shopping, after fees

Stop overpaying for the same bet on Kalshi and Polymarket.

The two exchanges price the same event differently every day. We show which one is cheaper after fees, in the odds you already read.

See today’s board Free daily digest (opens in a new tab)Edge Monitor — last month’s edge +$326.54

Next scanalerts members hear first

Full scans of every matched pair start at the top of every hour, UTC, and the countdown is to the next start. Telegram alerts go out when a scan finishes, usually 35–55 minutes after it starts, while the cases listed here change only when the page is rebuilt, less often, so members see a new gap first. The line under the countdown is the bot's own status, read about once a minute while this page is open: a scan running now, what the last one found as it landed, or that scans are running late; under it, the month's count. The same status keeps each case's "open now" current.

every hour, on the hour

Biggest gap this week

The payouts are what the stake would have bought at the prices when the case was widest — $100 on each venue for a gap, $500 across both legs for a fork — after each venue's one-way taker fee on entry, held to settlement. A gap this size is usually gone before you can take it. Research, not advice.One side traded $1.1K in 24 h — a thin book can quote a gap nobody can take.The gap is 31.2% of the price.

Will Ilija Srdanović become Prime Minister of Serbia following the next Serbian general election?

26% cheaper

+$156 on $100after fees, if it hit

Polymarket16¢Kalshi~~21¢, the higher price~~

$100 makes $590 on Polymarket and $434 on Kalshi if it hit.

fired Mon 16:31 UTC · members heard as the scan found it · closed 16:32 UTC · 1 min · seen 666 times in all, last Tue 05:56 UTCFull board →

Sportsbook banned in your state, or limited you for winning?

Kalshi and Polymarket are federally regulated exchanges. They run in most states where sportsbooks do not, and they do not limit winners.

Best this week

Who will win the next presidential election?25% cheaperPolymarket 15.3¢Kalshi ~~19.5¢, the higher price~~
+$152 on $100if it hit
Seen once at Thu 17:54 UTC · seen 465 times in all, last Fri 03:58 UTC
About this case
One side traded $8.2K in 24 h — a thin book can quote a gap nobody can take.The gap is 27.5% of the price.$100 makes $617 on Polymarket and $465 on Kalshi if it hit.
Will Chovy win Finals MVP at League of Legends Worlds?25% cheaperKalshi 16¢Polymarket ~~21.5¢, the higher price~~
+$147 on $100if it hit
Mon 09:24 → 15:26 UTC · 6 h · seen 387 times in all, last 19:01 UTC
About this case
One side traded $1.3K in 24 h — a thin book can quote a gap nobody can take.The gap is 34.4% of the price.$100 makes $588 on Kalshi and $441 on Polymarket if it hit.
What will Donald Trump say during midterm rally in Chillicothe, Ohio originally scheduled for October 28, 2026?26% cheaperPolymarket 16.5¢Kalshi ~~21.5¢, the higher price~~
+$147 on $100if it hit
Seen once at Thu 00:14 UTC · seen 22 times in all, last 00:22 UTC
About this case
One side traded $1.1K in 24 h — a thin book can quote a gap nobody can take.The gap is 30.3% of the price.$100 makes $573 on Polymarket and $426 on Kalshi if it hit.
Will Jakub Mensik win at least 4.5 more games than Adrian Mannarino?26% cheaperPolymarket 16.5¢Kalshi ~~21.5¢, the higher price~~
+$147 on $100if it hit
Seen once at Wed 17:36 UTC
About this case
One side traded $2.1K in 24 h — a thin book can quote a gap nobody can take.The gap is 30.3% of the price.$100 makes $573 on Polymarket and $426 on Kalshi if it hit.
Iowa winsPays either wayYES 45¢ on Polymarket + NO 44¢ on Kalshi
+$45 on $500either way
Sat 13:00 → 16:00 UTC · 3 h · seen 5 times in all
About this case
One side traded $11.8K in 24 h — a thin book can quote a gap nobody can take.$500 makes $545 either way.
Baylor winsPays either wayYES 56¢ on Polymarket + NO 35¢ on Kalshi
+$35 on $500either way
Seen once at Sat 00:00 UTC
About this case
$500 makes $535 either way.

Windows close within hours.

Members see every opportunity first, at the best price.

Last 30 days+$326.54

The free channel posts 6 hours later. Same bets, same size.

Both figures count the same cases and whale bets at the same size. The free one enters each when the free channel posts it, at that moment's price, and counts nothing for one that was already over. No fees and no slippage in either.

Last 30 days+$7.18

Same bets for both: $100 a gap · $500 a fork.

Alerts go out as each scan ends; this page is rebuilt less often. Members get every gap, fork and lag as the scan finds it, 35–55 minutes after the hour.

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Who got paid

2026-11-01Polymarket
Spread: Jets (-9.5)
Raiders
2026-11-01Polymarket
Spread: Raiders (-6.5)
Jets
2026-11-01Polymarket
Spread: Jets (-4.5)
Raiders

Every settlement and every dispute

Guides

Fine print

Same question, same answer. Every gap and fork assumes both venues settle the question the same way. A different resolution source or cut-off can lose a fork both legs — read both venues’ rule pages before you bet.
Quotes, not fills. Prices are archived bid/ask midpoints, not live quotes, and a thin book can quote a gap nobody can take. A card’s (i) names its volume when the book is thin.
Reading the numbers. A YES contract pays $1 if it hits, so 62¢ is −163 in sportsbook odds. “$100 makes $X” is what $100 paid on each venue after its fee, held to settlement; “+$Y on $100” is how much more the cheaper venue paid (a fork quotes the same trade per $500: what $500 across both legs made either way).