The Maximum Trailing Intraday Drawdown sets the lowest equity level your account is allowed to reach at any point during a trading session — including on open positions. It trails your highest equity point in real time, meaning as your account reaches new equity highs, the drawdown floor automatically moves up by the same amount. It never moves back down.
This is important to understand: the drawdown floor tracks your highest equity, not your closing balance. Even if you give back profits before closing a trade, the floor will have already moved up.
Example (100K account, $5,000 max drawdown):
Your account starts at $100,000 — the max drawdown floor is set at $95,000.
Your equity rises to $103,000 during a trade — the floor moves up to $98,000.
If your equity drops back to $98,000 at any point, the account is breached — even if the trade hasn't been closed.