Prices for gold, silver and platinum bullion products are live and updated every five minutes during Perth WA business hours (AWST), which is when you can purchase bullion products.
A countdown timer will appear on the screen when you are viewing a bullion product indicating how long before the next price refresh.
Once you are in the checkout process, the price will be locked for five minutes to allow you to complete your transaction. If you do not complete your transaction in this time, the price will refresh and you will need to restart the checkout process.