One of the most important ways to make the greatest return (and, also carry a greater loss risk) in Forex trading is with the use of a margin account. These accounts may let you trade as much as $100k in currency for as little as $1000. Margin accounts are the lifeblood of FOREX trading, so be sure you understand the broker's margin terms before setting up an account. You need to know the margin requirements and how margin is calculated. Does margin change according to the currency traded? Is it the same every day of the week? Some brokers may offer different margins for mini and standard accounts.