i think that percentage is relative to 1. read more about tick trin here: http://www.stockcharts.com/education/IndicatorAnalysis/indic_TRIN.html --RS
high OilTrader, the TRIN goes up and down all day, relative to 1 what you're just seeing is a percent change for an indicator where absolute percent change should not be used. http://www.investopedia.com/terms/a/arms.asp --RS