Need to watch for breakouts.
When treasuries and and utilities outperform the market, we typically have volatility in the market. So, if these charts turn around to the north side, we will likely see another correction. -Research work by Michael Gayed.
The weakness in the Dow Transportation sector shows that there is something wrong with the internal dynamics of the market.
This works like the MACD (or any other momentum indicators) - positive and negative divergence.