The same game has two prices. Trade the difference.
SportsParity devigs the sportsbook consensus into a true fair line and holds it against live Kalshi prices, the market disagreeing with itself, in cents, ranked, live.
The board
Full screener →Elise Reed @ Shanelle Dyer
Elise Reed
Mason Jones @ Marquel Mederos
Marquel Mederos
Ryan Kuse @ Márcio Barbosa
Ryan Kuse
Chicago Fire @ Orlando City SC
Orlando City SC
New York City FC @ FC Cincinnati
New York City FC
Toronto FC @ Inter Miami CF
Toronto FC
UFC · Elise Reed to win
Elise Reed @ Shanelle Dyer
Kalshi
13¢
Fair
16.6¢
Edge
+3.6¢
How the edge is built
Devig the books
Every major sportsbook moneyline is stripped of its margin. The median across books becomes the fair line, the market's honest probability, before the house cut.
Price the contract
Kalshi YES contracts pay $1 on a win, so a 54¢ ask is 54% implied. Both venues land in the same currency: cents of probability.
Rank the gaps
Fair line minus contract price is the edge. Wide positive gaps are +EV entries; when the venues cross, opposite positions lock a profit either way.
What an edge is worth
worked example · Elise Reed · Elise Reed @ Shanelle DyerKalshi asks 13¢ for a contract the devigged consensus prices at 16.6¢. Drag to size your position:
If it hits
+$10,358
If it misses
−$1,575
Expected value
+$254
That's the honest shape of edge trading: no single bet is a lottery ticket, a repeatable few-percent advantage, compounded over volume, is the entire game. The terminal's job is finding you that advantage before it closes.
Expected value ≠ guaranteed outcome · fees approximated · variance is real · not betting advice
Why the same game has two prices
Two venues, two crowds, two mechanisms, so their prices drift apart constantly. Parity is the exception, not the rule. That drift is the whole opportunity.
The sportsbook
- , Sets the line, bakes in a margin (the vig)
- , Moves with public money and risk limits
- , Both sides sum past 100%, the house edge
The prediction market
- , A live order book, traders set the price
- , Contracts pay $1 on a win, priced in cents
- , Slower to correct on thin or early markets
The Record
Receipts, not promisesEvery flagged edge is timestamped the moment it appears, then graded when the game settles, wins and losses, plus whether the price moved our way by tip-off. No tout site shows its receipts. This one does.
| Flagged pick | Detected | At close | Line value | Result |
|---|---|---|---|---|
| Rays | 66¢ | 58.8¢ | -7.2¢ | loss |
| Eduardo Henrique | 44¢ | 48.5¢ | +4.5¢ | pending |
| Tigers | 52¢ | 56.6¢ | +4.6¢ | win |
The old way vs. the terminal
| SportsParity | 8 browser tabs | Other tools | |
|---|---|---|---|
| Live devigged fair line | ✓ | , | some |
| Kalshi + sportsbooks in one view | ✓ | , | , |
| Crossed-market detection | ✓ | , | some |
| Ranked by edge, continuously | ✓ | , | some |
| Public graded track record | ✓ | , | , |
| Costs you nothing to watch | ✓ | ✓ | , |
Sharp traders don't predict games. They notice when two markets stop agreeing, and get there before the prices reconcile.
Sportsbooks and prediction markets price the same events with different crowds, fee structures, and speeds. Parity is the natural state; the moments it breaks are the opportunity. SportsParity exists to catch them.
Straight answers
Kalshi is a federally regulated prediction market, a CFTC-registered Designated Contract Market, not a sportsbook. As of mid-2026 it operates in 40+ states, including several where traditional sportsbooks aren't available, because it's governed by federal derivatives law rather than state gambling law. The legal framework is still being litigated, so availability can change. Always confirm Kalshi is live in your state on their site before trading.
Kalshi charges a transaction fee per trade, and that fee eats into thin edges. A 1¢ gap often isn't tradeable once fees apply. That's exactly why SportsParity ranks by size: the bigger the gap, the more survives the fee. Always price the fee into any trade; our calculator applies a conservative buffer, but check Kalshi's current fee schedule for exact numbers.
No. SportsParity is a data and analytics tool. It shows where two markets disagree on price. It never tells you what to trade, never accepts wagers, and never holds funds. What you do with the information is your decision, made at the venue of your choice.
Sportsbooks and Kalshi are different venues with different crowds, fee structures, and speeds. Books move on public money and set lines with margin; Kalshi is a live order book that can lag on thin or early markets. Those differences create temporary gaps that close fast, which is the whole point of watching in real time.
When the Kalshi price and the best opposing sportsbook price sum to less than a dollar, opposite positions at each venue lock in a profit no matter who wins. It's rare and brief, thin liquidity often means only small size is available, but it's the strongest signal on the board, and we flag it the instant it appears.
The board refreshes continuously from live sportsbook lines and public Kalshi market data. Prices still move between refreshes and can differ slightly at the venue, so treat the board as a scanner that points you where to look, then always verify the live price before you act.