Visualisation More datapoints than Categories

[AYoung]

Hi All.

I need some, what I hope is, basic help.

I am trying to chart a measure on a line graph visualisation and need the categories to display Months, but for the visualisation to have the line displaying data for each day. Is this possible, and if so, how? I have tried using the extra categories, however all values for days in a month are being totalled.

Thanks for any assistance you can give!