Creating EFS to track ema on a single chart with multiple timeframes

[hama123]

Hello,

I hopefully have a simple request, I have found the following efs which represents the EMS(8) either going up(in green) or down(in red). This efs works great on any chart with any timeframe. I am trying to see if I can display multiple timeframes on one chart e.g. 1minute, 2minute, 3minute of the ema(8). Here is the existing efs I have found, any guidence or assistance is appreciated.


var vMA = null;

function preMain() {
setPriceStudy(true);
setStudyTitle("EMA");
setCursorLabelName("EMA", 0);
setDefaultBarFgColor(Color.blue, 0);
setDefaultBarThickness(3,0);

var fp1 = new FunctionParameter("Length", FunctionParameter.NUMBER);
fp1.setLowerLimit(1);
fp1.setDefault(8); //Edit this value to set a new default

var fp2 = new FunctionParameter("Offset", FunctionParameter.NUMBER);
fp2.setDefault(0); //Edit this value to set a new default

var fp3 = new FunctionParameter("Source", FunctionParameter.STRING);
fp3.setName("Source");
fp3.addOption("Close");
fp3.addOption("High");
fp3.addOption("Low");
fp3.addOption("Open");
fp3.addOption("HL/2");
fp3.addOption("HLC/3");
fp3.addOption("OHLC/4");
fp3.setDefault("Close"); //Edit this value to set a new default

var fp4 = new FunctionParameter("Type", FunctionParameter.STRING);
fp4.setName("Type");
fp4.addOption("MAStudy.SIMPLE");
fp4.addOption("MAStudy.EXPONENTIAL");
fp4.addOption("MAStudy.WEIGHTED");
fp4.addOption("MAStudy.VOLUMEWEIGHTED");
fp4.setDefault("MAStudy.EXPONENTIAL"); //Edit this value to set a new default

}

function main(Length,Offset,Source,Type) {

if (vMA == null) vMA = new MAStudy(Length, Offset, Source, eval(Type));

/*****************************************
Insert your code following this text block
Use vMA.getValue(MAStudy.MA) for your code
******************************************/

if (vMA.getValue(MAStudy.MA,0) > vMA.getValue(MAStudy.MA,-1) ) {
setBarFgColor(Color.green);
} else {
setBarFgColor(Color.red);
}

return vMA.getValue(MAStudy.MA);
}

[LetUsLearn]

Hello again hama123,
I wrote this tonight where it will use the charts interval for MA1 and then I have two function parameters that default to 2 & 3 minutes that you can change to whatever you want. The 2 EMA's that don't use the chart's interval use the closing price for their calculations, but you can easily change that in the code. I will paste it here and also upload it in notepad...enjoy!

var fpArray = [];
var vMA1 = null;
var xMA2 = null;
var xMA3 = null;

function preMain(){
setPriceStudy(true);
setStudyTitle("EMA");
setCursorLabelName("EMA_1", 0);
setDefaultBarFgColor(Color.blue, 0);
setDefaultBarThickness(1, 0);
setCursorLabelName("EMA_2", 1);
setDefaultBarFgColor(Color.white, 1);
setDefaultBarThickness(1, 1);
setCursorLabelName("EMA_3", 2);
setDefaultBarFgColor(Color.magenta, 2);
setDefaultBarThickness(1, 2);

var x=0;
fpArray[x] = new FunctionParameter("Length", FunctionParameter.NUMBER);
fpArray[x].setLowerLimit(1);
fpArray[x++].setDefault(8);

fpArray[x] = new FunctionParameter("Offset", FunctionParameter.NUMBER);
fpArray[x++].setDefault(0);

fpArray[x] = new FunctionParameter("IntervalTwo", FunctionParameter.NUMBER);
fpArray[x].setLowerLimit(1);
fpArray[x++].setDefault(2);

fpArray[x] = new FunctionParameter("IntervalThree", FunctionParameter.NUMBER);
fpArray[x].setLowerLimit(1);
fpArray[x++].setDefault(3);

fpArray[x] = new FunctionParameter("Source", FunctionParameter.STRING);
with(fpArray[x++]){
setName("Source");
addOption("Close");
addOption("High");
addOption("Low");
addOption("Open");
addOption("HL/2");
addOption("HLC/3");
addOption("OHLC/4");
setDefault("Close");
}
fpArray[x] = new FunctionParameter("Type", FunctionParameter.STRING);
with(fpArray[x++]){
setName("Type");
addOption("MAStudy.SIMPLE");
addOption("MAStudy.EXPONENTIAL");
addOption("MAStudy.WEIGHTED");
addOption("MAStudy.VOLUMEWEIGHTED");
setDefault("MAStudy.EXPONENTIAL");
}
}

function main(Length, Offset, IntervalTwo, IntervalThree, Source, Type){
if(getBarState() == BARSTATE_ALLBARS){
vMA1 = new MAStudy(Length, Offset, Source, eval(Type));
xMA2 = ema(Length, close(inv(IntervalTwo)));
xMA3 = ema(Length, close(inv(IntervalThree)));
}
if(vMA1.getValue(MAStudy.MA,0) > vMA1.getValue(MAStudy.MA,-1)) setBarFgColor(Color.green);
else setBarFgColor(Color.red);

return [vMA1.getValue(MAStudy.MA), xMA2.getValue(0), xMA3.getValue(0)];
}

[hama123]

Hello,

LetUsLearn, thank you so much for your assistence, I have used all of the information you have provided to help me along further.

I have one other question, that may or may not be an easy one. I have tried everything I can think of but have not been able to get the results I am trying for.

Do you know if it is possible to have a timeframe of less than 1min, within the charts you can select 5second, 10second, etc. When writing my efs I am used to using inv(1) for a 1 minute interval, I can not seem to find anywhere it is possible to have a time period of less than 1 minute. Can it be done, if yes, guidence on how would be appreciated.

[ACM]

hama123
As per this article in the EFS Kb (which I found by searching for "inv()")
When passing a non-numeric interval value to inv(), a string value must be specified by enclosing the value in quotes (i.e. inv("D") or inv("W") ).
Since any tick based interval is going to be a "non-numeric value" you just enter it in quotes e.g inv("30S") or inv("200T") etc
Alex

Hello,

LetUsLearn, thank you so much for your assistence, I have used all of the information you have provided to help me along further.

I have one other question, that may or may not be an easy one. I have tried everything I can think of but have not been able to get the results I am trying for.

Do you know if it is possible to have a timeframe of less than 1min, within the charts you can select 5second, 10second, etc. When writing my efs I am used to using inv(1) for a 1 minute interval, I can not seem to find anywhere it is possible to have a time period of less than 1 minute. Can it be done, if yes, guidence on how would be appreciated.

[hama123]

Alex,

Thank you so much

[ACM]

hama123
You are welcome
Alex

Alex,

Thank you so much