While there is a range of balances that people begin with, $1,000 has been reported to us as a good place to begin. Anything less than this could be dangerous due to drawdown on an account's balance.
The software needs sufficient equity in the account to trade out of drawdown.
The "Traide Compass" is a per trade scenario and the trader should use with personal discretion.
Just make sure for all trading you are using proper risk management.