Thanks for your response Matthias,
I will try and explain in more detail what I require. Below is a screen shot of a Viz that is currently pulling through the minimum holidays selling price by Week Commencing, by Destination, by Competitor. I can easily change the view to be based on Avg price rather than Min Price. However I am looking to change this view to be based on the AVG price of just the top 10 cheapest prices.