All accounts in QuantInfra are multi-currency and multi-instrument.

Account currency

When creating an account, its base currency must be selected. When the account equity is calculated at the end of the day, all position and cash balance values will be converted to the account currency.

Cash balance

Cash balance includes:

Balance operations (deposits and withdrawals)
Trades booked to the account (the payment in the settlement currency of the contract is added or subtracted to the cash balance for contracts with type Stock and FX; commission for the trade is subtracted from the balance)
Futures variation margin
Interest and funding payments for open positions

Balance operations

Balance operations are used to adjust an account's cash balance. They can be created manually in the Control Panel. For brokers that allow downloading the balance operations history (e.g., Binance), the operations are downloaded automatically.

Creating a balance operation manually allows specifying 3 flags:

Flag	Description
AffectsBalance	Default = yes
Indicates whether the operation will change the balance of the account
AffectsPnL	Default = no
Indicates whether the operation must be added to the PnL.
For automatically downloaded funding payments is set to yes.
AffectsInvestment	Default = yes
Indicates whether the operation will change the investment
For automatically downloaded funding payments is set to no.

Investment and share count

One of the platform's concepts is that strategies must trade with a leverage of 1, where leverage is calculated as the position value divided by the investment.

This allows:

comparing strategies’ yield directly;
mixing strategies into books and calculating the book total return;
copying strategies from virtual accounts to ESAs.

When some strategies are added to a book, and there is a fund account connected to this book, investment helps to automate allocations to particular strategies: