Hi there, yes indeed, you dont need rank function to accomplish this task, as you pointed correctly you can oder in descending mode and set the "max visible number" option to 10 in the chart properties tab. Also make sure, the "Show X-Axis scrollbar" option under the same tab is unchecked.
Sorry, I think I misunderstood your question, I only read the first part. You can limit the number of objects display with rank function. For example if you want to display the top 10 selling products, add Product as a dimension and wirte a expression similar to the following:
