These are the "white whales" of the Memento community. When a user adds "hot" to their search, they are essentially asking: "Show me the most active, most recent, most valuable directory right now."
Skip the index. Memento is a film about memory, truth, and the unreliability of facts. Relying on a shady "hot" index for your viewing pleasure is ironically the most anti-Nolan thing you can do. index of memento hot
Moves forward in time (starting with Leonard in the hotel room). The Color Sequence: Moves backward in time. These are the "white whales" of the Memento community