Line chart tooltip filter with legend

It would be great if the data point you are hovering over would actually filter the tooltip instead of getting the tooltip just from the X axis in a line chart with legend. This way you can easily get detailed information of the exact line item you are currently hovering over instead of all items sharing the same value on the X axis.

If on day X there have been purchases by three customers (each customer is represented by a line) then I want to see more details of the one purchase I am hovering over via tooltip instead of getting all information for the purchases by all three customers. There is only so much space you can use in a tooltip and being able to streamline the filtering that is passed to the tooltip page would be a huge help.