I've pointed this out a number of times, but with respect to gold, the elephant in the room is the central banks. World macroeconomics is what you need to look at.
During the whole period between 2000 and 2011 and particularly between 2008 and 2011, the reason gold went up so much was that the central banks stopped selling it. The banks knew that the way out of the near-depression that GWB and Co. created was the reflate the world economy. So the thing to do was not stocks or gold but stocks AND gold, and I said this here several times and several years ago. Gold is simply a currency, and if the central banks want to see that currency go up, you are an absolute idiot to want to take the other side.
The fall in gold is simply the reverse of the above paragraph. My understanding is that the actual top in 2011 at around 1950 was put in place by the Japanese Central Bank selling a LOT of its gold to help finance Fukushima recovery. The fall in gold this year was triggered by European country central banks--AGAINST the advice of the European Central Bank--selling large amounts of gold to avoid bankruptcy. Who were they selling that gold to? The Chinese central bank. All of this is why in February 2013 George Soros sold is gold stake as did much of the "smart money", and I went from being long gold to being short gold.
In the short run, there may be a large countertrend rally starting soon, triggered in large part by the Cyprus central bank deciding to not sell its gold to save is government/currency, and thus the expectations of world economic growth (ex-US) are increasing and the central bank selling appears to have run its course.
Technical indicators are STRONGLY indicating a bottom (intermediate term at least) in gold. The expected countertrend rally would be expected to go to somewhere between 1400 and 1550, but if it generally follows the 1980-1990 period as an analog, this will be a place to get out (if long), not get in. This will likely be the last chance to close long at "decent" prices, and if it continues to follow the 1980's, gold will then lose another 50%. I will be looking to go long, maybe even this week, for the next 6-18 months, then go short again for the long term somewhere above 1400 for an eventual bottom somewhere in the 700-1000 range.