Methods, systems, and apparatus, including computer programs encoded on computer storage media, for dynamically modeling a page using dynamic data. One of the methods includes obtaining, from a user device associated with a first resource of a dynamic modeling system, a dynamic final event comprising data representing a transaction of the dynamic modeling system; generating, by a rule monitor of the dynamic modeling system and using the data representing the transaction, a task chain for the plurality of tasks, comprising: generating a plurality of tasks in the task chain, and determining, for each task in the task chain, one or more criteria for executing the task; and for each task of the plurality of tasks: determining, by the rule monitor, that the one or more criteria for executing the task are satisfied; and in response to determining that the one or more criteria are satisfied, executing the task.