The Account Protector
One of the example robots opens no trades at all. It watches the whole account, including trades you open yourself and trades from other robots, and closes them when the account reaches a limit you set: for example a loss of 4% in one day or 8% in total, or before the weekend.
It cannot stop another robot, or you, from opening a new trade: it can only close trades after they open, and price gaps, slippage or a lost connection can take a loss past the limit.
Its numbers are examples, not any prop firm's rules. Check your firm's published limits and set your own.