Hi, I try to get top e-commerce products, but sorting does not work
http://piwik.foobar.ua/index.php?module=API&method=Goals.getItemsSku&idSite=1&period=range&date=2012-12-25,2013-01-08&abandonedCarts=0&filter_sort_column=avg_quantity&filter_sort_order=desc&format=xml&token_auth=foobar
How to sort by avg_quantity?