Adyen- multiple currency payment with $79 plan

[aegeantang]

Hi there, 

We have integrated our Adyen with Shopify. But our setting inside Adyen could not be found in our payment gateway. 

Our Adyen account support (HKD & USD). We want our store support the same for HK users will pay at HKD, while out of HK to be settled at USD. 

How could we use multiple currency with Adyen inside Shopify?