Nervous and Numb looks for divergences between the price action of SPX and the VIX based on the number of standard deviations from their 20 period moving averages.
When SPX is doing well but VIX spikes, it considers the market 'nervous'. When SPX is down but VIX stays relatively low, it considers the market 'numb'.
SPX often tops soon after a 'nervous' reading, while a 'numb' reading often marks the bottom.
