Many thank for the expression , it work fine. My though is to have all Q1 and Q2 and Q3 and Q4 having individual color , but after using your expression , i find it better just make Q4 one color and the rest one color. This way more easy to view the trend , for example i am focus on forecast Q4 sales for 2015 , which is next Qtr.
So some time it is base on luck that we find right expression.
Thank a lot.