How are currency prices determined? Client Service Team 29 July 2021 02:39 Updated Exchange rates are determined by basic supply and demand factors, including interest rates, economic growth, inflation and major events like war or political change. Related articles How do I change my leverage? Can I place a trade when the market is closed? How do I transfer funds between personal accounts? What’s the difference between a Pip, Tick and Point? I forgot my password – what do I do?