A dynamic and recursive transaction gateway system and its method are disclosed. The dynamic and recursive transaction gateway system is designed to handle financial, medical, and other types of transactional information. The dynamic and recursive transaction gateway system provides intelligence for processing transactions in all phases of the system. The dynamic and recursive transaction gateway system is empowered by introducing the protocol of Level 4 Data which are supplementary data used by the decision-making engine in the system. The dynamic and recursive transaction gateway system has a capability of generating and processing tokenized data which includes tokens for predetermined numbers of transactions, tokens for predetermined periods of time, tokens for unlimited time, and chain-bound tokens shared across locations. The dynamic and recursive transaction gateway system provides a novel approach: recursive transaction processing. Through the recursive transaction processing, sub-transactions generated from an original transaction are recursively fed to the system. The sub-transactions are individually processed by the system and routed to different destination systems.