AMA Kaufman

["Ir. Yuwono Thamrin" <satria@xxxxxxxxxxxx>]

Name : Adaptive Moving Average Indicator
Notes: From "Smarter Trading" by Kaufman
Desc : An exponential moving average in which the smoothing 
           factor varies with the "efficiency ratio". Efficiency 
           ratio is the ratio of total price excursion divided by 
           the sum of all individual excursions of each bar. It 
           equals 1.0 if all moves are in one direction over the lookback
period.
By:     Ir. Yuwono Th., translated into MSWIN 6.0 formulas from 
          Bob Fulks' ELA based upon code and descriptions in Kaufman's book 

_diff       
Abs(C-Ref(C,-1))                      {Individual price excursions}

_signal
Abs(C-Ref(C,-10))		           {Total Excursion over period}

_noise
Sum(Fml("_dif"),10)		           { Sum all individual excursions}

_efratio
Fml("_signal")/Fml("_noise")	    {Efficiency Ratio}

_smooth
Power(Fml("_efratio")*(0.666-0.0645)+0.0645, 2)    
                          {Shortest smoothing=0.666,  Longest
smoothing=0.0645}

_AMA
PREV + Fml("_smooth")*(C-PREV)

Notes: These are constructed using 10 periods, you can alter this
       by replacing every entry of 10 with the desired time period.