On weak days I've been watching for evidence of the PPT(Plunge Protection Team) getting actively involved.
When things look ready to drop bigtime I watch for a slowing and then upside reversal on low volume. It's exactly what we had today so I bot GS, TNA and shorted FAZ at the same time with the same result. By raising the market enough so that the weak shorts can't take the pain and start to cover it becomes a self fulfilling prophesy.
1st chart shows the QQQQ begin the run up on no volume.
GS long
sold GS