Change colour on selection of dates

Hi All,

I am stuck on one of client's requirement.What I want is 'How to change the colour of the data when I compare two dates.

For eg: When comparing sales of two dates,if sale is less then 'Red' and if sale is high then 'Green'.In the attached file we are comparing dates are 5 and 7 for June'13.Product is 'Hoover Wind Tunnel'.

Similarly if they change date selection the colour coding should give the same result.

Is it possible?

Thanks