I have mostly stopped commenting on the gold bull market, as the widespread adoption of inflationary monetary policy by every major government on the planet has all but guaranteed a continued rise in the gold price. However, last Friday (January 4, 2013) may possibly have been the day that the most recent gold price decline came to an end, due to the technically meaningful and usually decisive "bull hammer bottom" technical signal that day (this type of bottom usually confirms an exhaustion of selling pressure).
Nobody I know of can predict "when," but the directionality of the gold price has been clearly upwards since December 2011 (D bottom). The current (C) rise appears only to have started last Friday, January 4, 2013 (the probable conclusion of the "B decline"), so it is "young."
Following this "last" very big pullback, the final blowout bubble top in gold would finally occur. By the Adens' charting system, 2019 would be the true top of the secular gold bull market - if it is typical, and it would be somewhere north of $5000 by then, probably $8000 or higher. This is all approximate.
It is also possible that gold could go into an extended secular mega-bull market, as bonds have done for the past 30 years.That is, most bull markets seem to run 17-18 years (so 2001-2019 would be a "standard" 18-year gold bull market, as was the case from 1962-1980).
So long as governments print trillions per year in new and worthless currency, we know that gold will rise (nothing else is possible). When that stops, the gold bull market will be over.
However, I'm not sure that moneyprinting and competitive currency devaluation by most major world governments will necessarily stop in 2019. Note that bonds have been in a 3-decade-plus uptrend since 1981-82 (the end of the last major inflationary period). If gold is in a mega bull market, it could rise through 2030 or longer, before massive global inflationary monetary policy would ultimately defeat itself.