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Montreal
Posts: 8 since Feb 2012
Thanks Given: 2
Thanks Received: 7
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Hi, I am having problems with Keltner Channels. I am using the same formula (confirmed by a esignal programmer and multicharts programmer). However I am getting different values.
The Keltner Channel is pretty basic. I believe Esignal is plotting the right Keltner Channel and Multicharts is not. Has anyone had this problem? And yes I am using the same parameters.
Esignal Code:
/*********************************
Provided By:
eSignal (Copyright c eSignal), a division of Interactive Data
Corporation. 2009. All rights reserved. This sample eSignal
Formula Script (EFS) is for educational purposes only and may be
modified and saved under a new file name. eSignal is not responsible
for the functionality once modified. eSignal reserves the right
to modify and overwrite this EFS file with each new release.
Description:
Keltner ATR Band
Version: 1.0 10/29/2009
Formula Parameters: Default:
Length 20
ATRMult 3.75
Notes:
**********************************/
var fpArray = new Array();
var bInit = false;
function preMain(){
setPriceStudy(true);
setShowCursorLabel(true);
setShowTitleParameters(false);
setStudyTitle("Keltner ATR Band");
setCursorLabelName("Up Band", 0);
setPlotType(PLOTTYPE_LINE, 0);
setDefaultBarFgColor(Color.red, 0);
setCursorLabelName("Dn Band", 1);
setPlotType(PLOTTYPE_LINE, 1);
setDefaultBarFgColor(Color.red, 1);
var x = 0;
fpArray[x] = new FunctionParameter("Length", FunctionParameter.NUMBER);
with(fpArray[x++]) {
setLowerLimit(1);
setDefault(20);
}
fpArray[x] = new FunctionParameter("ATRMult", FunctionParameter.NUMBER);
with(fpArray[x++]) {
setLowerLimit(1);
setDefault(3.75);
}
}
var xKUp = null;
var xKDn = null;
function main(Length, ATRMult) {
var nBarState = getBarState();
var nKU = 0;
var nKL = 0;
if (nBarState == BARSTATE_ALLBARS) {
if(Length == null) Length = 20;
if(ATRMult == null) ATRMult = 3.75;
}
if (bInit == false) {
xKUp = efsInternal("Calc_KeltnerBand", Length, ATRMult);
xKDn = getSeries(xKUp, 1);
bInit = true;
}
nKU = xKUp.getValue(0);
nKL = xKDn.getValue(0);
if (nKU == null || nKL == null) return;
return new Array(nKU, nKL);
}
var bSecondInit = false;
var xMA = null;
var xATR = null;
function Calc_KeltnerBand(Length, ATRMult) {
var nResUp = 0;
var nResDn = 0;
var nMA = 0;
var nATR = 0;
if (bSecondInit == false) {
xMA = sma(Length);
xATR = atr(Length);
bSecondInit = true;
}
nMA = xMA.getValue(0);
nATR = xATR.getValue(0);
if (nMA == null || nATR == null) return;
nResUp = nMA + ATRMult * nATR;
nResDn = nMA - ATRMult * nATR;
return new Array(nResUp, nResDn);
}
MULTICHARTS:
inputs: Price( Close ), Length( 20 ), NumATRs( 3.75 ), Displace( 0 ) ;
variables: var0( 0 ), var1( 0 ), var2( 0 ), var3( 0 ) ;
var0 = AverageFC( Price, Length ) ;
var1 = NumATRs * AvgTrueRange( Length ) ;
var3 = var0 + var1 ;
var2 = var0 - var1 ;
condition1 = Displace >= 0 or CurrentBar > AbsValue( Displace ) ;
if condition1 then
begin
Plot1[Displace]( var3, "UpperBand" ) ;
Plot2[Displace]( var2, "LowerBand" ) ;
Plot3[Displace]( var0, "MidLine" ) ;
Thanks!
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