The chart below shows both Google and Blackberry with 10-cent range bars. One-half of the trading session (9:30 a.m. to 1:00 p.m. EST) for Google can barely be compressed to fit on one screen ...

Risk is an interesting concept.When the market sells off (grey line in Chart 1a falls) the volatility, shown as the VIX index, spikes almost instantly (green line turns to red) When the VIX spikes ...