Proportional by Balance adjusts the trade volume for copiers based on the balance ratio between the signal provider (master account) and the copier's account. Remember balance is your balance + credit.
For example, if you copier proportionate by balance 1, if the signal provider's account has a balance of $10,000 and the copier's account has a balance of $1,000, the copier's trades will be scaled to 10% of the master trade's volume. This ensures that trade sizes are appropriately aligned with the copier's account balance, minimising risk while maintaining proportional exposure.