You can set a different currency for each web shop.
Click [Web store] - <web shop> - [Pricing] - [Currency].
[Use default currency]
Enabled
Check that the default currency is set.
Click [Price and formula editor] - [Currency].
Disabled
Set a custom currency for the web shop.
Select a currency from the drop-down list.
Amounts are displayed with the selected currency code from the drop-down list or you can define a custom currency sign.
[Currency sign]
Enable the checkbox and type the currency symbol. You can type text or use an ALT code, for example, ALT 0128 for the euro symbol.
Click [Save].