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  • PriceAndStoch.efs

    File Name: PriceAndStoch.efs


    Description:
    This formula converts the Stochastic outputs to the price scale of the chart to create an overlay of the Stochastic where the study shares the same y-axis as price. This creates a fixed, or scaled, relationship between the price and the Stochastic study.

    Formula Parameters:
    %K Length: 14
    %K Smoothing: 1
    %D Length: 3
    Length for Scaling: 50

    Notes:
    The “Length for Scaling” parameter determines the conversion factor for the Stochastic outputs. The basic rule of thumb here is to enter a number equal to the number of visible bars in your chart.

    Download File:
    PriceAndStoch.efs




    EFS Code:
    PHP Code:
    /*********************************
    Provided By : eSignal. (c) Copyright 2003
    *********************************/

    function preMain() {
        
    setPriceStudy(true);
        
    setStudyTitle("Price And Stochastics ");
        
    setCursorLabelName("%K"0);
        
    setCursorLabelName("%D"1);

        
    setDefaultBarThickness(10);
        
    setDefaultBarThickness(11);

        
    setDefaultBarFgColor(Color.blue0);
        
    setDefaultBarFgColor(Color.red1);
        
        var 
    fp1 = new FunctionParameter("nKlength"FunctionParameter.NUMBER);
        
    fp1.setName("%K Length");
        
    fp1.setLowerLimit(1);
        
    fp1.setDefault(14);

        var 
    fp2 = new FunctionParameter("nKsmooth"FunctionParameter.NUMBER);
        
    fp2.setName("%K Smoothing");
        
    fp2.setLowerLimit(1);
        
    fp2.setDefault(1);

        var 
    fp3 = new FunctionParameter("nDlength"FunctionParameter.NUMBER);
        
    fp3.setName("%D Length");
        
    fp3.setLowerLimit(1);
        
    fp3.setDefault(3);

        var 
    fp4 = new FunctionParameter("nScaleLength"FunctionParameter.NUMBER);
        
    fp4.setName("Length for Scaling");
        
    fp4.setLowerLimit(1);
        
    fp4.setDefault(50);
    }

    var 
    aHighs null;
    var 
    aLows null;

    var 
    study null;
    var 
    vHH null;
    var 
    vLL null;

    function 
    main(nKlengthnKsmoothnDlengthnScaleLength) {
        var 
    nState getBarState();
        var 
    vK null;
        var 
    vD null;
        
        if (
    study == null) {
            
    study = new StochStudy(nKlengthnKsmoothnDlength);
            
    aHighs = new Array(nScaleLength);
            
    aLows = new Array(nScaleLength);
        }
        
        if (
    nState == BARSTATE_NEWBAR) {
            
    aHighs.pop();
            
    aLows.pop();
            
    aHighs.unshift(high());
            
    aLows.unshift(low());
        } else {
            
    aHighs[0] = high();
            
    aLows[0] = low();
        }

        if (
    aHighs[nScaleLength-1] == null) return; // arrays are not filled yet

        
    vK study.getValue(StochStudy.FAST);
        
    vD study.getValue(StochStudy.SLOW);
        if (
    vK == null || vD == null) return;
        
        
    //define price scale from Highest High and Lowest Low from the last nScaleLength bars.
        
    vHH high();
        
    vLL low();
        for (
    0nScaleLength; ++i) {
            
    vHH Math.max(vHHaHighs[i]);
            
    vLL Math.min(vLLaLows[i]);
        }
        
        
    /*** convert stochastics to price scale (rsy equation:  
            old stock value * ((price scale max - price scale min) / 100) + price scale min
        ************/
        
    vK = ( vK * (( vHH vLL )/100) ) + vLL;
        
    vD = ( vD * (( vHH vLL )/100) ) + vLL;

        return new Array(
    vKvD);

    Jason K.
    Project Manager
    eSignal - an Interactive Data company

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