Rolling chart with multiple companies for multiple months

Hi guys,

I have half a solution;.

On my tab you can see 2 individual months at the bottom which I collect data for. I want to setup a rolling chart with each company and each month's data to be pulled into a rolling chart. but struggling to start this setup.

Can anyone take a look at my spreadsheet and advise? I just can't figure out how to start it to have it split by each company for every month

thanky ou!