Aids in identifying changes in volatility direction.
EDIT: just noticed that URL is now password protected. The concept from the author is simple: use EMA and SMA smoothing of the VIX as two signal lines. When they cross you have a change in VIX direction. I simply coded that for SPYIX which is a slightly different (but theoretically similar) index vs VIX. SPYIX provides intraday updates without a subscription so this indicator can be used for intraday tracking.