Extend Dual KPIs Vis. to Multiple One

Standar Dual KPIs Vis. allows us to see how two different metrics perform at a given point of time. The problem Is that we can cross only two metrics. Let us cross as much as we want to. E.g., I work in SEM, I would like to see how CTR, Cost, Clicks, Impr. perform over a certain period of time (lets say last month). With current Dual KPI Vis I can do it by creating 2 Dual KPIs graphs (2x2). However, when I move across the dates in one of them the other one remains steady. In overall, it would be great to let us decide how much KPIs to compare in a certain period of time