When looking at gold price data, you must take the time to get as accurate and up-to-date information as possible. This means that you need to know at least what the price of gold was back when it was just a little over two years ago. It would help if you had a decent idea of what it was when it was at its highest and its lowest points. Of course, gold only increases and decreases in price based on the economy and world events, so if you can predict where it might go next, you will have a very good idea of where the value is going.
You should keep in mind some things when you are looking at gold price data. If you find one trend that seems to consistently show up, try to find out what caused it.