Options Trading

What happens if buy or sell orders are placed when there is some open position also in the same contract?

In both cases buy and Sell, the Marginable Buy order or Marginable Sell order is arrived at the Contract level. Marginable Buy order is calculated by deducting Net Sell Position from the Total Buy orders Marginable Sell order is calculated by Deducting Net Buy Position from the Total Sell orders Margin is recovered only on the Marginable Buy/Sell order Quantity.