Think this chart is great. It was presented by Dewet Moser, Alternate Member of the Governing Board of the SNB today at the SNB Apéro 2014. I swapped the captions from German to English.
Very interesting to see how the heat map has turned cold with just short bursts of volume and price action two times in last 18 months.
Such heat maps are useful in gaging investor psychology and key technical levels, which I understand to be levels at which lots of volume or high volatility occured, floors or tops were set.
I disagree that these levels marked in dark red aren’t relevant, as the efficient market gang often invokes.