IBKR's Recurring Investment Feature

IBKR offers an automatic trading feature whereby account holders may set up a 'Recurring Investment' instruction with the cash amount, asset to invest into and the schedule when to invest (e.g. buy 500 USD of IBKR on the 2nd day of the month).

Additional Information

Powered by IBot
Overview of the recurring investment feature
When does the recurring investment occur?
What happens if I do not hold the currency the stock is denominated in?
Will I receive whole shares or fractional shares?