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BETABETAOne bet per leg, the way you'd say it. Mix leagues or stay in one. Every leg has to hit for the ticket to cash.
Books price same-game parlays below the multiplied number, because those legs move together. Testing one? Put in the price you were offered.
Every leg has to win. A pushed leg drops off and the ticket pays at the price of the legs left; if every leg pushes, the stake comes back. That is how books settle them.
Each leg is a rule, so it usually matches several bets on a slate. "QBs averaging 250+" is a dozen quarterbacks on a college Saturday. Rather than pick one for you, Crak'd grades the average ticket: as if you had picked any of them at random. One parlay per slate, so a huge slate counts once, like a small one. The record is in expected wins, which is why it can read 7.4 wins rather than 7.
A slate is a day, a week, or a game. Basketball pairs legs on the same day. Football pairs them in the same betting week, Tuesday to Monday, so Saturday college and Sunday NFL can share a ticket. Same game pairs legs only inside one game, which is the only way to test how a quarterback's over and his receiver's over move together.
The price is the legs multiplied unless you set your own. Books price same-game parlays below the multiplied number because those legs are correlated, so if you are testing one, put in the price you were actually offered.
Long parlays need a lot of history. Every extra leg cuts the number of slates where all of them had a bet, and cuts the hit rate, so the interval gets wide fast. Up to 15 legs, the most the big books take, but past 6 the history can rarely tell a winning ticket from a lucky one. Crak'd is a research tool, not betting advice.