Your quoted exchange rate is valid for 10 seconds. The quote must still be valid when you select Confirm & Convert Funds for the conversion to be completed at that rate.
If the quote expires before you confirm the conversion, you will be prompted to refresh the rate. A new exchange rate will then be displayed and will be valid for a further 10 seconds.
Important: Exchange rates can fluctuate throughout the day. If your original quote expires, the refreshed exchange rate may be different from the rate you were initially shown.