Price goes up.

The whole stake is at risk, and the gain has no ceiling.

Price stays above the price you pick.

You're paid up front and keep it if price stays above. The further it falls below, the more it costs.

Price goes up, but not enormously.

Cheaper than a plain up-bet because the winnings stop at the higher price.

Price goes up, funded by taking on the downside.

Costs little or nothing up front, but a fall costs you real money. The loss is not capped.

Price drifts up but stops before the higher price.

Cheap, and can even pay you to open. But a violent rally loses without limit.