I don't even know what this is, but is this what you are looking for? http://www.barchart.com/chart.php?sym=$SKEW&t=LINE&size=M&v=0&g=1&p=D&d=X&qb=1&style=technical
That's what I use currently. Unfortunately, it is only EOD calcs. Perhaps, there is no real time quote.
Stockwatch gives option chains real time for about $20 a month but you need to have a way to view the chains. I use Hoadley tools for graphing and analysis.
I just read about this for the first time. The spikes in down markets seem small. What is your reason 4 wanting to trade this? 1245
As a valuation indicator for volatility/convexity in vol ETFs. Not so much as timing. Would like to figure out a filter, but I still look at technicals/trend. I may try it with Convexx's pitchfork. But, I am leery of selling vol these days.