A gold futures contract is a tradable instrument for the purchase and delivery of 100 troy ounces of gold. Each futures contract, like gold, has a unique set of contract specifications that are set by the futures exchange. 
Gold futures trading is an agreement between a buyer and seller at a specified price in a contract that will expire on a specific date. Gold is trading on the CME Globex systems with transparent pricing, orders, and positions.
There are many advantages of trading gold futures contracts, one of which is that gold futures offer traders direct market access for speculating on the price movement of gold. Additionally, gold futures provide good liquidity virtually 24 hours a day, lower trading capital requirements, and uncorrelated diversification. Gold futures can also offer traders more trading opportunities and flexibility over mining stocks, CFDs, and ETFs with their many limitations.
Gold futures are traded on a well-regulated exchange where orders are matched and cleared on a fair and level playing field with full price and order transparency. Traders can place buy and sell orders through their broker to enter or exit a position virtually 24 hours a day in the gold futures market.
Yes, you can trade gold futures with NinjaTrader. NinjaTrader is an industry-leading futures broker offering low commissions, low margin rates, and safety of your account funds. With NinjaTrader you can trade dozens of the most actively traded futures markets in the world including gold futures contracts. 
Like every futures contract, the primary risk here is that the price of the gold futures will go against the trader’s position. Mining sector news and government reports related to supply and demand, or storage and exploration can all have a significant effect on the price of gold futures. 
Economic activity from the global gold industry has a significant impact on the world economy, with its wide use in jewelry manufacturing, electronics, and as the primary storage of wealth for individuals, corporations, and central banks all over the world.