FAQs  > Topic: Trading
A day trade margin call is triggered when you exceed your day trading buying power. You can avoid this by following three simple rules:
- Know your day trading buying power before you place any trades. You can check it by logging in to your account and navigating to Manage Accounts.
- Make sure the total amount of all your day trades on any given day do not exceed your day trade buying power.
- Know your trading requirements – some securities have elevated trading requirements.
To learn what causes day trade margin calls and how you can avoid them, please watch this video.
Important Note: All of the calculations, explanations, and examples in this presentation apply to an account that has not already received a prior day trade margin call. When an PDT account has an open, unmet, day trade margin call, some rules & calculations used in calculating day trading buying power & subsequent day trade calls change and can become more stringent.