Am I understanding this correctly the idea is to have a bar graph displaying the sample data. But in the actual data table there are only 3 columns. Keyfield, TimeStamp and Action. Then the two additional measures that we want to create is based off of the discount of 'Insert' or 'Delete' commands for each keyfield?
Do you happen to have a workbook which you have started at all? The community can generally provide better assistance to questions with a workbook to go off of.