Orbex operates in four currencies: USD, EUR, GBP, and PLN.
You can make deposits in whichever currency you desire. However, if the deposited currency is different from the currency of your Wallet or Trading Account, the funds deposited will be converted into your wallet or trading account currency, at the prevailing foreign exchange rate, before being added.
Therefore, it is suggested that you use one of the currently offered currencies to avoid any conversion fees.