Yellen's speech pushed markets both up and down, but probably left more minds stuck in indecision than offered a clear path forward. Markets don't like indecision, which gives bears and weak longs an opportunity to sell. There are still key support levels to break, but recent weeks of tight action could lead to an unraveling.
The S&P finished as registered distribution with new 'sell' triggers in On-Balance-Volume and Directional Indicator. The index has been stuck in a relative downward turn since July (against Small Caps). This index is offering the clearest 'sell' signal.