What does "drawdown lock" or "DD Lock" mean?

On the Sprint Challenge funded phase, the trailing drawdown stops trailing upward once your account balance reaches $100 above the starting balance (e.g., $50,100 on a 50K account). After that point, the drawdown level becomes fixed and no longer increases. This protects your buffer once you've built a small cushion. Note: DD Lock applies only to the Sprint funded phase. If your account's max loss limit has reached the Initial Balance Lock and you withdraw all your profits, this will lead to your account closing.