Margin: A deposit contributed by a customer as a percentage of the current market value of the securities held in a margin account is thus the margin amount. This amount changes as the price of the investment changes. basicaly, margin is a buying a security by borrowing funds from a brokerage house.

Net Profit: The overall profit of a trade.

Profit: The range within which a particular position makes a profit. Generally used in reference to strategies that have two break-even points - an upside break-even and a downside break-even. The price range between the two break-even points would be the profit range.