While I don’t have any statistical support for this, I observe it seemingly quite often….where GG breaks out of a chart pattern (bullishly or bearishly) ahead of the GDX and beats the GDX to a lower low or higher high.  It often tips me off and allows me to be poised for a trade.  Good example can be seen right now in the chart below.  I never intended for my phrase to mean that GG leads all miners up or down….I only compare it to the GDX, for which it is the biggest component. btw – GDX down 1.7% today….GG down over 3%.

GDX vs GG