Multi-Currency, when integrated with Bold Checkout, gives your customers the flexibility to checkout in the currency of their choice. Your customers will be able to select their preferred currency on the storefront, then pay in that currency when they checkout.
It is important to note that this integration requires that both Bold Checkout and Multi-Currency are installed and setup on your store. You will also need an account with a third party payment gateway in order to accept payments in that currency.
Store owners that use a custom domain for their store, however, need to have their own SSL certification in order for Multi-Currency to function properly with Bold Checkout. A paid, private SSL is required in order to maintain the selected currency through a customer's checkout process.
Please visit BigCommerce SSL Certificate for more information on how to obtain a private SSL.