: This is typically 4x your maintenance margin excess from the previous day's close for Pattern Day Traders (PDT).
: In a cash account, your buying power is simply your settled cash . Key Rules and Restrictions Equity with Loan Value - IBKR Campus interactive brokers day trading buying power
: This is the critical figure that forms the basis for your buying power; it is the sum of your cash and the market value of your marginable securities. : This is typically 4x your maintenance margin