01) Access the Control Panel

02) After login click Configuration >> Currency Exchange Store Settings

03) On the Choose the API line to refresh the product price

04) Click Options >> EDIT

Comments:
For automatic updating to occur the product code field must be the currency code when entering / editing products, for example: USD

Choose an API of your choice, some are paid and others are free, for more information please contact the API website directly.

In the currencylayer.com API requires filling in the KEY API field in the KEY KEY line currencylayer.com

05) After clicking on UPDATE

06) After defining your API set your profit rate in the Profit line to add in the price get from api

If you want to add an additional fee in the line Tax percentage to add in the price get from api