It should be able to retain the filter applied on a particular chart. For example, i have multiple charts one is at country level, 2nd is at state level and 3rd is at city level. If user sees something wrong in the country level chart then he will click on that particular country to filter the data in state and city maps. then he want to see the one of the state which is performing bad, so he will click on that state to see the related cities under that. Assuming that he will see the data of the country , state which he selected But the current problem is, as soon as the state is selected the country filter will be gone. User will see all the cities under that selected state but may belong to multiple countries. There should be a way to retain the filters applied on graphs and option to erase them completely
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