In the context of CryptFolio, a fixed amount is a single set of currencies, each with their own balances.
For example, you might wish to create a fixed amount for savings that you are holding on a device that you don't wish to disclose, by creating the following record in your portfolio:
|US Dollars||5,000 USD|
CryptFolio assumes that these balances have always been available, so there are no transactions involved. You can have multiple fixed amounts per portfolio, each with different currencies.
In the future, CryptFolio will also support uploading arbitrary transactions and multiple balances per transaction.