Gold prices recently breached the historical barrier of $1200 per ounce in the spot market before back to around $1100 per ounce. Gold market has been experiencing an unprecedented boom for the last ten years.In the last decade, many investors turned towards forex after the historic crash in the stock market. Many small investors lost more than 60-70% of their saving accounts in the stock market crash. Now, forex is a great money making opportunity. It is being said that forex trading will make many millionaires in this decade.Many people don't know this that you can trade gold on forex too. Many forex broker platforms that you use to trade forex, allow trading of gold and silver against the US Dollar (USD) from the same platform. Both these precious metals have high demand in the industrial sector and as the global economy recovers from the recession, the prices of gold and silver are expected to skyrockets as industrial production picks up and consumers start buying again. When you trade a currency pair, you go long on one currency and short on the other. In other words, you simply buy one and sell the other.But when you trade gold, you take long or short position in gold in the spot market with the opposite position in US Dollar (USD). In other words just like trading a currency pair like EURUSD, JPYUSD, GBPUSD and other pair involving USD as the counter currency when you trade gold, you are trading against USD.So, in spot gold trading on forex, you are trading one troy ounce of gold against USD. Interestingly the symbol for this is also XAUUSD with XAU representing one ounce of gold. Now, suppoe the price quote in the spot market is 1100 XAUUSD. What this means is that one troy ounce of gold in the spot market right now is equal to $1,100 USD.Just like anyother financial market, the price quote in the gold spot market has got a bid/ask spread. So if the price quote is 1110/1115, it means that you can sell one troy ounce of gold in the spot market for $1,110 and buy one troy ounce of gold at $1,115 meaning you will have to pay a spread of $5 per troy ounce when trading in gold in the spot market.Spot gold trading on forex is a fast moving market and the spread keeps on changing throughout the day.A standard lot of gold is equal to 10 troy ounces. So if you buy one lot of gold at the rate of 1110/1115, you will have to pay $11,105 for the 10 ounces of gold. Suppose the market rallies and in the next hour the price quote is 1117/1121, you can sell your lot at $11,170 making a profit of $65. Not bad huh!Gold is also know as anti dollar. What this means is that their is an inverse correlation between gold and USD. This inverse relationship can help you hedge your positions in other currency pairs.