Combos: multi-leg trades and what they really pay

A combo puts 2 to 20 separate picks into one position. Every leg has to come in; if one misses, the combo is worth nothing. In exchange the payout multiplies rather than adds.

What can be a leg

Only head-to-head sports games, and no two legs from the same game. That restriction is not squeamishness, it is arithmetic: a combo is priced by multiplying the legs' probabilities together, which is only valid when the legs are independent. Two outcomes from the same match are not independent, and neither are most economic or crypto markets, so the engine rejects them rather than selling you a price it cannot justify.

What it pays

The fair multiplier is one divided by the product of the legs' prices. What you are actually paid is that number reduced by a 10% house markup, and capped at 500x however long the combo gets. Two legs at 50¢ are fair at 4x and pay about 3.64x.

Open combos also carry their own limit, and it is measured on what they could PAY, not what they cost: on 25K Evaluation (1-step) the combined potential payout of every open combo is capped at 2% of the starting balance, $500. Settle or cash one out before adding another once you are at the line.

A combo can be cashed out before its legs resolve, at the market's current view of what is left. It is the same risk engine as everything else: a combo's exposure counts against your limits and its losses count against your floor exactly like a single position.