To add a new post, please log in or register All Blogs Analytics & ForecastsWeekly TrendsForecastsTrading SystemsMy TradingChartsTrading StrategiesStatisticsTrading IdeasScalpingNeural NetworksWave CountMarket NewsCurrencyMetalsCrude OilCompany NewsEventsBanksBrokersLaw/RegulationsOther Rules Perry Kaufman 6 675 Trading Systems TRADING MANUAL - What is Kaufman Efficiency Ratio Developed by Perry Kaufman. Described in his book 9 September 2014 #ratio, Kaufman Efficiency