Secure Analytical and Advisory System for Transaction Data

Methods and systems are described herein for securely analyzing transaction data of a user. A server computing device establishes a secure connection with a client device, which transmits transaction data to the server. The server establishes a hierarchy of nodes to profile a user's purchase history. The hierarchy includes a plurality of article nodes and category nodes. The server creates a new article node instance corresponding to the transaction data, the new article node storing descriptive properties of at least one item purchased by the user determined from the transaction data. The server links the new article node instance to at least one of the category nodes by classifying the descriptive properties of the item purchased with respect to relationships defined by the hierarchy. The server generates and transmits an event trigger to remind the user of a follow-up action and authenticates the client before the trigger is delivered.