The first two price rallies began in 1971 and 1977, during and after the de-linking of the U.S. dollar from gold. The most recent price rally has its seeds in the dot-com bubble in the early 2000s.  The chart below shows two long-term monthly gold rallies, with the second rally appearing to be an amplified but similar version of the first.  I have overlaid Fibonacci sequence numbers to demonstrate how the price of gold has spiked upward in expanding, fractal waves during these prior surges. 

In the 1970s, gold traveled through four Fibonacci levels (by this measure) in less than a decade after the removal of the gold standard. From 2000 through 2012, amid the dot-com and housing bubbles, gold also traveled through four Fibonacci levels on the way to $1,900.