Methods and systems for visualizing data include forming hierarchically related graphs having a common time-series axis. The hierarchically related graphs are displayed in a linear arrangement, such that shared values on the common time-series axis align for each graph. The hierarchically related graphs are automatically updated in accordance with a user selection of an element in a data hierarchy by removing graphs below a lowest-order common ancestor in the data hierarchy between the user selection and a previously displayed selection and replacing the removed graphs with new graphs that reflect the user selection.