Here are several factors that will most likely bring gold even lower in 2013:




Positive factors for gold would be, for instance: central bank purchases of gold, even small investors acquiring physical gold, but also appetite for ETFs - any of these, if occurring in substantial volume will propel the shiny metal's price higher.
The weakening dollar, negative US economy-related news also gives a boost to gold. Right now, the dollar is gaining strength - which is mainly due to the fact that other competing currencies, like the euro and the Japanese yen are devaluing. This makes the American fiat currency seem a lot stronger.
But: much of the gold traded is COMEX gold, exchange traded funds, not physical gold. Speculators play the metal's price up or down, they're only interested in the profit, but this as well, influences gold to drop or rise. The price is the same for physical gold as well.
For the 2013 - 2014 period there's a plethora of negative forces: the likeliness of gold dropping is extremely high.