How has the balance of the user changed during the last 30 days

This is a type 2 question as we, as developers, can use the data of the transactions logged by the users in order to show them and answer the question of how much have they spent and recieve in the last month.

How are we implementing this

This BQ is seen by the user in the home page where there is a graph that visually shows how the balance have increased and decreased over the last month. this is also relevant for other periods of time like 1 day, week, month and year.