Lookback Call Options
A lookback call option gives the holder the right to buy the underlying asset at the lowest price it achieved during the option's lifetime. This essentially allows the investor to buy at the bottom of a market move.
This is an incredibly powerful tool for crypto traders who want to capitalize on significant upward trends without needing to perfectly time their entry. The payoff is calculated as the difference between the highest price reached during the term and the lowest price reached during the term (or a strike).
This makes the lookback call a bet on both the trend and the range of the asset. Due to the high cost, they are often used to hedge long-term exposure rather than for speculative trading.
The risk for the writer is significant, as they are essentially selling the ability to perfectly time the market. These instruments are at the frontier of complex derivative design.