Hello Manoranjan,
Thank you for your question. The sorting can be set in the slice for each dimension. Please visit our documentation page about slice object - http://www.flexmonster.com/api/slice-object/. Also here is a jsFiddle example for you with the demonstration - http://jsfiddle.net/flexmonster/cw78cjvn/.
Please let us know if you have additional questions here.
Best regards,
Dmytro.