gold, page-1127

Joe - I think you answered your own question. They track a commodity price, and domestically, are influenced by the currency - i.e. other markets....not other stock markets, but completely different markets....commodities and currencies.
That's what I meant by saying hey "have a life of their own".
On this subject of inter-market relationships, there's a seminal book from a leading technician, John Murphy.
Intermarket Technical Analysis: Trading Strategies for the Global Stock, Bond, Commodity, and Currency Markets Hardcover – March 1, 1991
by John J. Murphy

He's basically the founder, the brains, behind stockchart.com which started late 1990's.