For IB's margin accounts, they dont do margin calls but instead go straight into liquidation. I'm wondering under what metric is this done? (ie in terms of Net Liquidation Value, Initial/Maintenance Margin etc)? Does your Initial and maintenance margin need to be higher always than your net liquidation value? So the moment Maintenance margin > Net Liquidation Value, it is autoliquidation? Or is it Equity with Loan < Maintenance Margin = liquidation? Im trying to understand the specific metric and condition where liquidation occurs.