Because this symbol is overdue for a correction, I’ve arbitrarily drawn a chart that could signal the start of one if GDXJ falls to 55.17. That would trigger a theoretical ‘sell’ signal with downside potential to at least 51.74.  An additional ‘hidden’ support at 55.63 could provide a tradable bounce. The supports should not give way easily, and that is why we can safely assume Mr Market means business if they do.