Marginal trading is simply the term used for trading with borrowed capital. It is appealing because of the fact that in Forex currency trading, investments can be made without a real money supply.

This allows investors to invest much more money with fewer money transfer costs, and open bigger positions with a much smaller amount of actual capital.

Thus, one can conduct relatively large transactions, very quickly and cheaply, with a small amount of initial capital. Marginal trading in an exchange market is quantified in lots. The term "lot" refers to approximately $100,000, an amount which can be obtained by putting up as little as 0.5% or $500.