First, add balance in reais:
Access the app at Add funds and select To your investment account. Then, tap Add funds.
You can access the account data to transfer (TED or Pix) from a Brazilian account in your name to the account of Ouribank, Nomad's partner in this kind of operation.
Remember that TED operations work only on business days and up to 5 pm according to the official time in Brasília. Pix transfers do not have this limitation.
After that, convert your balance in reais to dollars:
With the amount in reais in your account, go to Add Funds > To your investment account to see the commercial US dollar quote.
After you confirm the operation, the US dollars will be available in your investment account in up to 6 hours.
The minimum amount to do this operation is R$50 (fifty reais), and the fees are an OF of 0,38% and an operating rate of up to 2%.