You're holding a live ticket and want to guarantee the outcome. This is how much to put on the other side, and what you keep either way.
Hedging converts an uncertain outcome into a certain one, and you pay for that certainty. The guaranteed amount is always less than the expected value of simply letting the original bet ride. That isn't an argument against hedging — it's the price of removing variance, and sometimes that's worth paying.
Hedge when the outstanding amount is large relative to your bankroll, when the other side has moved far enough that the lock is genuinely good, or when losing the ticket outright would change your behaviour on the next twenty bets. Don't hedge a small futures ticket purely because watching it is uncomfortable.
You don't have to lock the whole thing. Staking half the calculated amount removes half the variance and keeps half the upside. Run the number here, then decide how much certainty you actually want to buy — and check the drawdown calculator if the answer depends on what a loss would do to your bankroll.
We run these numbers on every game on the board, every day — or see all ten calculators on one page.