How can I change the product currency to HKD in my online store?

May I know how can I change the currency to HKD which shown below the product after I enable country & region selector and changed from like the US to Hong Kong. Thank you so much for your help.

I already choose the option "Show prices to customers in their local currency. ", but still it can’t be converted automatically.

Hi @dreamscapelabco

I hope you are doing good and welcome to the Shopify Community!
I am San from MS Web Designer.

You can install this app and config as per the guideline:
https://apps.shopify.com/doubly-currency-converter

Guideline-
https://www.youtube.com/watch?v=2aTSaklWDx0

Regards,

San