Efficiency Ratio (ER) ER = (total price change for period) / (sum of absolute price changes for each bar) but why bother...its the 20,1 stochastic on 60 minute...or the %B. And %B would still lead since it's =price... stockcharts.com/c-sc/sc?s=$SPX&p=D&b=5&g=0&i=p98717884186&r=1354127585596 3,2 BB just to Isolate price to compare with 3,1 stochastic and over lay on the 20,2 doubleBB