<prompt> Human: My husband and I travel quite regularly and we always use a credit card as much as we can because it limits the amount of cash we have to carry. In many countries the POS device will ask us if we want charged in their local currency or my home Canadian currency. I want to know which is best for me? What is the difference for me? thanks very much!  <response>: Always choose foreign currency. This will allow the credit card company to set the exchange rate. Otherwise the merchant is able to set the exchange rate to whatever they like. 