...
ExchangeRateLookup_URL: https://www.bankofcanada.ca/valet/observations/FX<basecurrency><foreigncurrency>/json?start_date=<date-30>&end_date=<date>
ExchangeRateLookup_ResponseTypeResponseFormat: JSON
ExchangeRateLookup_ResponsePath: $.observations[-1:]..v
...
ExchangeRateLookup_URL: https://www.bankofcanada.ca/valet/observations/FX<basecurrency><foreigncurrency>/xml?start_date=<date-30>&end_date=<date>
ExchangeRateLookup_ResponseTypeResponseFormat: XML
ExchangeRateLookup_ResponsePath: //o[last()]/v
...