▲ Market goes up: If futures rise above the double-up level, your weekly bushel commitment doubles. You still price at the enhanced strike, but you're obligated on more bushels.
▬ Market stays flat: You accumulate your weekly bushels at the strike price — a premium over where the market is trading. Best-case scenario.
▼ Market drops: If futures drop to the knockout barrier, the contract ends. You keep all bushels already accumulated at the enhanced price, but no further accumulation occurs.