Convert any odds, size a bet with Kelly, and split an arbitrage stake so every outcome pays the same. No signup.
Implied % = the win probability the price bakes in (before the book's margin).
Kelly maximizes long-run growth. Most pros bet ¼–½ Kelly to cut variance. No edge → no bet.
Splits stake so both outcomes return the same. Profit > 0 only when the prices are a true arb.