EPM Formatting sheet -formatting last 2 months

Hi

We have 12 months actuals and 12 month plans in columns.  I have requirement to formatting last 2 months of Actuals (Column)in different colour in Rolling forecasting template, so formatting should be applied dynamically. Cant create additional properties in masterdata, so thinking of conditional formatting, some thing like G=2=PLAN apply  conditional formatting to column E and F but its not working.

Could please suggest the simplest way to do this ?

Thanks

Jack