Account currency: The currency used for a primary account or sub-account. The account currency is designated when an account is created, and cannot be changed.
Primary account: The first account that is created after you fill out all of the forms and accept the Account Agreements to open an fxTrade account. The account currency of your primary account is the currency that was selected when the primary account was created.
Sub-account (or secondary account): Sub-accounts may be created under your primary account without having to resubmit Account Application forms. You may have multiple sub-accounts; however, all your sub-accounts may be linked to only one primary account. Each sub-account can be in any of the supported currencies, regardless of the primary account's currency.
You may freely transfer funds between primary and sub-accounts, or deposit funds directly in a sub-account in the currency of that sub-account. You can withdraw funds from a sub-account in its currency (as long as you withdraw funds by the same method as you deposited them).