Are you looking for total products per order, unique product per order, or something else? I only know a bit about CJA, but in workspace you can capture the units associated with each product and get 'total units', and putting that against an order number will give you the number of total units per order. If you want distinct products per order, you could make a calculated metric with "total units" divided by "distinct count product ID" (using the approximate count distinct function). Then place that against the order number. I would imagine the same type of things are possible in CJA.