A single chart unlock is a one-time purchase that unlocks an analysis (Foundational, Advanced, or Partnership) for a single chart. The analysis is unlocked and available in your account forever.
A subscription unlocks an analysis product (Foundational, Advanced, or Partnership) for unlimited charts for as long as the subscription remains active. All subscriptions include access to the complete Rave I’Ching—Ra’s original descriptions of each of the 384 Lines.