If you are selling abroad and your customers are using currency that differs from yours, you might be interested in adding an option to change them. If it is your case, you can enable currency select in 'Currency' section of 'Theme Settings'.
Notice! Checkout transaction can only be shown in the operating currency of your store, which should be specified in Standards and formats section of admin panel ('Settings' > 'General' > section 'Standards and formats'). You also need to be aware of exchange rate specifics of any Shopify theme. Exchange rates used by Shopify are refreshed twice a day based on the rates at xe.com. Although rates are automatically scheduled to be updated at 00:00 GMT and 07:00 GMT, the updates might take place up to a couple of hours after their scheduled time.
Working with 'Currency' section, you may: