To exchange funds between any of your accounts:
If you do not have that currency account yet, see here for instructions to add one.
A 0.4% fee is applied to any exchange above your free allowance according to your plan.
On market hours (23GMT Sun to 22GMT Fri)
Out of market hours (22GMT Fri to 23GMT Sun) we fix the rate we provide to protect ourselves against fluctuations, this means:
The interbank exchange rate is constantly fluctuating. You’ll receive the amount of funds in consonance with the rate that was live at the moment that you locked the exchange. The rate that we lock in for the weekend may not be the same as the rate that is available when the markets open on Monday morning. To see the exchange rates, visit: www.investing.com.