The %b is not leading, after re-reading Ziko's tutorial it doesn't work with the 30 minute, but rather the 60 minute, and it's leading. Thanks for pointing out my error. http://stockcharts.com/c-sc/sc?s=SPY&p=60&yr=0&mn=0&dy=3&i=p37450633475&a=255733628&r=6308