Interesting replies.... I 'd like to develop my own indicator (given that there might not be anything much else out there). Though its hard to figure out the approach to take towards it, I like the implied correlation concept. I think it ought to also more directly measure the absolute movement of key instruments. I checked the correlations and I find that EEM is ultra responsive to movements in the VXX, also the swiss franc (at least in the last 6 months). At the moment I'm considering
EEM
OIL, CHF
the implied correlation
I'd like to include some type of measure of political unrest/economic stress and maybe OIL and CHF is as good as anything for this purpose.
Also, traders talk of the 'internal structure of the market' the likes of the number of stocks making new highs or lows etc. Is there a good simple indicator for this?
What else could be put into the solution?
Also, how to measure when its on the right track? I think it ought to measure the probability of various size movements in the market. As well as providing a single index figure
Visually, it ought to present a cone chart of the probability of various movements (y axis) over time (x axis),