Yes, you can.
Tikkl supports the following currencies:
USD, EUR, CAD, GBP, SGD, AUD, INR
You can create your event to use any one of the above currencies.
Currently, Tikkl Support can only setup the currency for your event.
You can send a request using the Help button or talk to Tikkl CustomerSuccess to set it up. However this feature will soon be rolled out so that the admin can set their own currency while creating the event.
Please note: You can create multiple events with different currencies however each event can use only one currency type.