Transaction data will be synchronised to Xero as soon as the transaction has completed. After you first connect your Currencies Direct currency accounts it may take a few minutes to update.
Once your data has synchronised with Xero, a date-timestamp will be recorded within the Currencies Direct currency account. If for any reason a transaction record fails to synch to Xero, then the next data synch will automatically reattempt to synch any missing records.