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demand index for Amibroker (AFL)
Rating:
3 / 5 (Votes 5)
Tags:
oscillator, amibroker
Converted it from tradstation,
It is quite close to the formula that was posted by Stev wiser.
A number of parameters setting was available
this is also discussed in some details in
http://forum.equis.com/forums/thread/21109.aspx
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Indicator / Formula
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//http://www.purebytes.com/archives/omega/2002/msg04345.html
//http://forum.equis.com/forums/thread/21109.aspx
arg = ParamList("Weighted Close", "Close|Avg|WtClose|Median", 2);
Const = Param("Constant", 5, .50, 10.5, 0.01);
periods = Param("periods", 19, 10, 40, 1);
Lb = Param("lb", 2, 2, 10, 1);
if(arg == "Close") WtClose = C;
if(arg == "Avg") WtClose = Avg;
if(arg == "WtClose") WtClose = (H + L + C + C)/4;
if(arg == "Median") WtClose = (H + L)/2;
AvgTr = MA(HHV(H, Lb) - LLV(L, Lb), periods);
WtCratio = (WtClose - Ref(WtClose, -1))/Min(WtClose, Ref(WtClose, -1));
VolRatio = Volume/MA(Volume, periods);
Constant = ((WtClose * 3)/AvgTr) * abs(WtCRatio);
Constant = IIf(Constant > Const, Const, Constant);
Constant = VolRatio /exp(Constant);
BuyP = IIf(WtCRatio > 0, VolRatio, Constant);
SellP = IIf(WtCRatio > 0, Constant, VolRatio);
BuyPressure = EMA(BuyP, periods);
SellPressure = EMA(SellP, periods);
tmpDI = IIf(SellPressure > BuyPressure, -BuyPressure/SellPressure,
SellPressure/BuyPressure);
DMI = IIf(tmpDi < 0, -1 - tmpDI, 1 - tmpDI)*100;
Plot(dmi, "demand index", colorBlue, styleLine);0 comments
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