Random Date & their conversion rates will be there, you need to map every order date with respect to its interval dates of conversion in data. (Eg. 01/01/2008 INR Rate - 75, 14/01/2008 INR Rate 77.5, orderdate 07/01/2008 - It should pickup 01/01/2008 Conversion rate & Order date with =>14/01/2008 should pickup conversion rate of 14/01/2008