On the Risk Mgmt page, open an account and set a Daily loss limit under Account Lockout (for example $500), choose what counts (net realized plus open, realized only, or open only), and save. When the account's P&L reaches the limit, Signal Trade App closes all positions, cancels orders and locks the account until the next session opens at 6:00 PM ET. A locked account receives no copies, and the lock cannot be removed or raised until then. Available on Tradovate and Rithmic accounts. Your prop firm still enforces its own limit at the broker.