It's also possible that gold could de-couple from the Dollar/stocks and continue to rise even if the USD rallies and stocks correct. That happened in the last few years of the 70s gold bull market.
Personally, I think gold moves on it's own now. The only downside to gold may come if the market suddenly and drastically drops, and positions in gold are forced to be liquidated in order for margin calls (like we saw last year).
Agreed. My only concern with gold and using it as an indicator is how small the market is. Gold spot tends to be gamed on a daily basis.