OPTION TRADE ON CURRENCY PAIRS

HOW TO TRADE THIS INSTRUMENT :

Lets say you are very confident of this AUD/USD pairs trending down, you sell(put) on it.If it closed below your price within the stipulated timeframe....you win or make profits. Normally the percentage is between 75~88% (depending on the currency pairs ). If it closed above your price....you will lost 100% of your investment.
You must understand the movement and behaviour of the pairs before you trade.You will get yourself burnt if you fail to do your homeworks.