MTD Prompts in SAP BW Universe

Hi, I have a requirement where we have to display the MTD data . We have "Last Business day" in Key Figures. Can anyone guide me how to achieve this in Universe. Basically I want to create a condition in universe which when applied on a Webi Query should return that month's(MTD) data only. I am using BOXI 3.1

Thanks,

Pankaj Goswami