Which account currency should a beginner choose?

Your account currency is the money you measure profit and loss in. Choosing one that isn't your home currency adds a layer of conversion risk on top of every trade.

What do you use?

• your account currency, and whether it matches where you live
• how it affects your pip value on the pairs you trade
• whether you've ever traded an account in USD from a non-USD country, and how that went

The arithmetic is covered in position sizing, which walks through the conversion steps.