Yes you can change your international account base currency to USD. You can do this by sending a request to helpdesk.za@ig.com. There is no material difference to the account. Same instruments will be available, same tax rules apply, the same deposit/withdrawal timeframes will apply.
The difference depends on the product that you will be trading. If you intend to trade mostly dollar denominated products then it would make sense to change your base currency to USD so that you can save on FX conversion fees.
Currency of my account
in IG Account Support - MyIG Help
Posted
Thank you for your reply.