I am trying to display in a bar chart, a list of top 10 cutomers, by number of orders, left to right. In the same chart I would also like to view each of their average order amounts.
In my raw data I have each order for each customers with each order cost.
Your measures, in the Bar/Line View, should be [Order ID] and [Order value], with functions Non-empty count and Mean. The Split choice should be [Customer ID]. You can click on the option to use secondary axis, so you can display different scales for the 2 measures on the same chart (on the Measures menu, next to the variable). On the Split menu, Limit Values option, you can decide how many values to include.