Schaff Trend

SchaffTrend.efs  
EFSLibrary - Discussion Board  

File Name: SchaffTrend.efs

Description:
Schaff Trend

Formula Parameters:

• MA Short : 23
• MA Long : 50
• Cycle : 10

Notes:

Download File:
SchaffTrend.efs


EFS 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:        
    Schaff Trend    
    
Version:            1.0  06/22/2009
 
Formula Parameters:                     Default:
    MA Short                            23
    MA Long                             50
    Cycle                               10
    
Notes:
    
**********************************/
var fpArray = new Array();
var bInit = false;

function preMain(){
    setPriceStudy(false);
    setShowCursorLabel(true);
    setShowTitleParameters(false);
    setStudyTitle("Schaff Trend");
    setCursorLabelName("Schaff Trend", 0);
    setDefaultBarFgColor(Color.green, 0);
    setPlotType(PLOTTYPE_LINE, 0);
    setDefaultBarThickness(2, 0);
    setStudyMax(101);
    setStudyMin(-1);
    var x = 0;
    fpArray[x] = new FunctionParameter("MA_Short", FunctionParameter.NUMBER);
    with(fpArray[x++]) {
        setLowerLimit(1);
        setDefault(23);
    }    
    fpArray[x] = new FunctionParameter("MA_Long", FunctionParameter.NUMBER);
    with(fpArray[x++]) {
        setLowerLimit(1);
        setDefault(50);
    }        
    fpArray[x] = new FunctionParameter("Cycle", FunctionParameter.NUMBER);
    with(fpArray[x++]) {
        setLowerLimit(1);
        setDefault(10);
    }            
}

var xMACD = null;
var xMACDLLV = null;
var xMACDHHV = null;

function main(MA_Short, MA_Long, Cycle) {
var nBarState = getBarState();
var nRef = ref(-1);
var nMCD = 0;
var smconst = 0;
var nST = 0;
var nLLV = 0;
var nHHV = 0;
    if (nBarState == BARSTATE_ALLBARS) {
        if(MA_Short == null) MA_Short = 23;
        if(MA_Long == null) MA_Long = 50;
        if(Cycle == null) Cycle = 10;
	}
	if (bInit == false) {
        xMACD = macd(MA_Short, MA_Long, 1, hlc3());
        xMACDLLV = lowerDonchian(Cycle, xMACD);
        xMACDHHV = upperDonchian(Cycle, xMACD);
        bInit = true;
	}
    smconst = 1 + Cycle / 2;
    smconst = 1 / smconst;
    nMCD = xMACD.getValue(0);
    nLLV = xMACDLLV.getValue(0);
    nHHV = xMACDHHV.getValue(0);
    if (nMCD == null || nLLV == null) return;
    nST = ((nMCD - nLLV) / (nHHV - nLLV)) * 100 + 0.01;
    nST = smconst * (nST - nRef) + nRef;
    return nST;
}