When currency values are stored in Ometria, they are stored in local currency (i.e. the currency used by your customer in their location) and the currency associated with your account, which you defined during onboarding.
Ometria automatically converts the values in local currency into your account currency for reporting purposes.
Ometria always uses the most recent exchange rate (updated hourly) based on when the order was placed.
E.g. if an order was placed at 14:25 on 1st January 2021, the exchange rate used is the rate from 14:00 on that date.