FAQs  > Topic: Trading
To learn what day trading buy power is and how it is calculated, 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 a Pattern Day Trader (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.
For more on day trading, see Day Trading Rules & Requirements.
For more information on buying power, explore Margins & Buying Power.