Exchange currency scenario in PO 7.4

Hi Experts,

I want to fetch data from website:http://web-services.oanda.com/rates/api/v1/rates/JPY.xml?api_key=CUPOANDA&decimal_places=5&date=2015-03-17&fields=averages&quote=GBP for currency conversion using dynamic web link. So could you please help me? I read all the sdn blog and discussion but did not get any progress.

Thanks,

Kumar