Can you drill down in graphs that are linked to a KPI?
By default, the graph that is linked to the KPI would have been pinned. This capability allows you to freeze a graph at its current value for future use. This means that the graph view will remain the same even if the grid data is drill down or roll-up to the lower or higher level in the hierarchy. You would need to unpin the graph if you require the linked graph to refresh according to the drill down performed on the grid. ARC provides a one-time setting in the 'Visual Personalization' to set the default from Pin Graph option to 'Do not pin graph'.