The current functionality for importing foreign currency exchange rates allows you to select either Today or a Date Range, defined by a start and end date defined in the job parameters. In order to pull single average rate for a period, you enter the start date and end date of the range, select the Single Rate for Date Range button and run it.

Unfortunately, there is no way to set up a recurring batch job to run on the 1st day of a month and pull rates for the preceding month automatically, as the original data parameters are hard coded. It would be very helpful if the Date Interval functionality used in other areas of the system. Batch jobs for running reports, for example the Ledger Transaction List, support Date Intervals in the Parameters. This functionality should be available across all batch jobs where a date range is an option. If the selection of choices between Today and a Date Range is what prevents that from being implemented, I'd suggest going to purely a date interval method, and Today can be easily defined as a date interval choice.