After reading about how volatility (price movement) can impact a traders results, I had an epiphany. It might be worthwhile to trade the most volatile contracts, since trading profits come directly from price movement. I've been researching how to program a 20 day historical volatility indicator in easylangauge. So far, the base formula would look like: Code: StdDev( Log( average( (c/ c) , 20 ) ) ) * SquareRoot(365) * 100 This seems like it would yield volatility as a percentage measurment so that one could compare how volatile one contract is to another. Is my thinking incorrect?