Moving Average Range

[chrisf95003]

Hi
I am trying to make an indicator that wil paint the bar of a chart when a few moving averages are in a tight range. So if the 8, 13, 21 and 34ema are all in a 5 point range of each other it will color those bars. Am I writing this correctly? Any thoughts would be greatly appreciated.

Chris

var vEMA8 = new MAStudy(8, 0, "Close", MAStudy.EXPONENTIAL);
var vEMA13 = new MAStudy(13, 0, "Close", MAStudy.EXPONENTIAL);
var vEMA21 = new MAStudy(21, 0, "Close", MAStudy.EXPONENTIAL);
var vEMA34 = new MAStudy(34, 0, "Close", MAStudy.EXPONENTIAL);
var vLastAlert = -1;

function preMain() {
    setPriceStudy(true);
    setStudyTitle("movavgrg");

}

function main() {

        if (
            AbsValue(vEMA8.getValue(MAStudy.MA)-vEMA13.getValue(MAStudy.MA)) <= 5.0 &&
            AbsValue(vEMA21.getValue(MAStudy.MA)-vEMA34.getValue(MAStudy.MA)) <= 5.0
        ) onAction1();

}

function postMain() {
}

    function onAction1() {
        setPriceBarColor(Color.RGB(255,0,255));
        vLastAlert = 1;
    } 

[ACM]

Chris
In the mean time here is a corrected version of your efs.

var vEMA8  = new MAStudy(8, 0, "Close", MAStudy.EXPONENTIAL);
var vEMA13 = new MAStudy(13, 0, "Close", MAStudy.EXPONENTIAL);
var vEMA21 = new MAStudy(21, 0, "Close", MAStudy.EXPONENTIAL);
var vEMA34 = new MAStudy(34, 0, "Close", MAStudy.EXPONENTIAL);
var vLastAlert = -1;

function preMain() {
    setPriceStudy(true);
    setStudyTitle("movavgrg");
    setColorPriceBars(true);
    setDefaultPriceBarColor(Color.black);
}

function main() {

    if (Math.abs(vEMA8.getValue(MAStudy.MA)-vEMA13.getValue(MAStudy.MA)) <= 5.0 &&
        Math.abs(vEMA21.getValue(MAStudy.MA)-vEMA34.getValue(MAStudy.MA)) <= 5.0)
            onAction1();
}


function onAction1() {
    setPriceBarColor(Color.RGB(255,0,255));
    vLastAlert = 1;
} 

Also do all the averages have to be within the 5 point range? If that is the case then I am not positive that this efs will show that.
Perhaps you may want to first calculate the mean of the averages then create a 2.5 point band around the mean that must contain all 4 averages. That should ensure that each average is no more than 5 points away from all the other ones.
Alex

[chrisf95003]

Alex,
I think your idea about the 2.5 point band should work good and definately alot cleaner that the 5 point range idea. Just out of curiosity, is there a way to make an array and have each parameter tested against the array? Like:

arrray1 qw \ 8 13 21 34 \;

ema8 <= array1; #so it tests each element in the array
ema13 ...the same for the other elements

I know the language is off, I have been working a little with perl for a sys ad project, so I got some of the concepts from there.

Thanks for your help,
Chris

Chris,

I put together a little efs that will demonstrate how to accomplish what you want. The JavaScript Math.max function does not work with arrays based on my experience. I created a function called aMax to obtain the max of an array. The step that checks for the max between the array and a number is tmp = Math.max(aMax(sample),4);. To look at the output of the efs, open the Formula Output window, or left mouseclick the button on the screen titled click here to see the aMax Trace.txt file

I marked the applicable steps that you need with //here
I hope this helps

var barcount = 0;
var sample = new Array(5,6,7,8,9,8,7,6,5,4,3,2);
function preMain(){
 
}
function main(){

    if (getBarState() == BARSTATE_ALLBARS) {//true once during initial load and subsequent reload
        barcount = 0;
    var tmp =     Math.max(sample,4);
    trace ("sample = "+sample);
    trace ("12: tmp = "+tmp);
    tmp = Math.max(aMax(sample),4);//here 
    trace ("14: tmp = "+tmp);

        
    }
    //if (getCurrentBarIndex() < -2 )return;
    
    if (getBarState() == BARSTATE_NEWBAR) {     

        
    }
    if (getCurrentBarIndex() == -1 ){}
    

//put stuff u want implemented every tick in here

//
}
function aMax(a){//here 
    var a1 = a.length;var a2 = -9999;//here 
    for(i=0;i< a1;i++){//here 
        a2 = Math.max(a[i],a2);//here 
    }//here 
    return a2;//here 
}//here 

//########### trace section required to be copied complete ##############
var traceon = true;// previous tracefile is overwritten if this is true
//var traceon = false;// previous tracefile is added to if this is false
var nStudy = "aMax Trace.txt";// -  name to be used to name tracefile and button
var    tracefile = new File(nStudy);
function trace(data1){//if (getCurrentBarIndex() < -13)return;
    debugPrintln(data1);//comment this line out if you do not want the output echoed to the formula output window

    if (traceon){//first use is true, overwrites previous trace file
        traceon = false;
        tracefile.open("wt+");tracefile.close();//opens and overwrites previous file
    }
    tracefile.open("at+");
    tracefile.writeln(data1);
    tracefile.close();
    if (trace.caller.name!="preMain" && trace.caller.name!="postMain")tButton();//call to the button that allows 
                                                                                //opening text file
}
function tButton(){
drawTextPixel(50, 10, (" click here to see the "+nStudy+" file " + "@URL=C:/Program Files/eSignal/FormulaOutput/"+nStudy),  
Color.red, null, Text.RELATIVETOLEFT | Text.RELATIVETOBOTTOM|Text.FRAME, "Comic Sans MS", 13,"trace11");
}
//########## section required to be copied complete ################ 

[chrisf95003]

Hi Steve,

This script is awesome! Thank you for taking the time to put it togeather.

Chris

Chris,

You are welcome, I appreciate the feedback