The 'WOW' Factor

Dear gurus,

I have been using Excel for a couple of years now and have got off the starting blocks, but have a long way to go!

I have recently learnt a little about named formulas which I used in the attached sheet to determine the start and length of a trend analysis. Easy peasy for you, but I was very pleased with it.

Anyway, my boss is head and shoulders above me in the Excel knowledge stakes, and was not impressed by my efforts to produce a functional trend analysis. So I come to you cap-in-hand, to ask if you could suggest ways to improve my sheet and knock the boss down a peg or two.

Im not asking for you to do it for me and then plagerize it, I love to learn about excel, I'd just like some suggestions on how to give it the 'WOW' factor and a pointer to a place to learn it would be a bonus

Many many thanks,

Hopefull,