Quote from arnaud:
I added the "volatility" in percent
(High-Low)/low : http://www.mataf.net/en/analysis-volatility.htm
But I think it's not important, most of traders buy and sell 100k contract. The variation in pip or $ seems most important.
(excuse my poor english)
Excel has a function called stdev(Array)
use close(t)/close(t-1) of over 100 days say
then the function stdev (Of those fugures)
GL