How do I prevent EFS's from using data older than current day for indicators ?

[€ur0z0ne-Tr@der]

What I'd like to do:

*) Assume I have an SMA (e.g 50 periods)
*) will plot/calculate on an intraday chart

Now, If I load the efs with the SMA into a lets say 3min chart the advanced chart retrieves alot of past data. The last 50 values of yesterday are used for calculating the first value of the current day (1st bar). This is what I want to prevent - I want my indicators to start from scratch every new day i.e. the MA would not plot calculate until 50 bars in the current session have arrived.

This should happen for all my indicators (different period-lenghts). What is the best way to achieve this ?

Thanx,
EZ-T

[Guest]

I put together a working efs with the functionality you desire (I believe) with one 50 bar delay and another 25 bar delay.

You will need to copy those sections identified to your code, then declare an object for each variable you want delayed. While somewhat complex, there are only 5 lines you need to modify to suit your needs surrounded by:

// @@@@@@@@@@@modify lines only@@@@@@@@@

Then include those lines as commented / delineated into your efs. If you have any problems, post your code and we can work through any issues.

//---------------------------------------------------------
/**************************************************
Steve Hare © December 2004                          
Use and/or modify this code freely. If you redistribute it
please include this and/or any other comment blocks and a 
description of any changes you make.                      

Title:  barcountdown.efs
By:         Steve Hare
Email:      [email][email protected][/email]
Version:    initial release 12/04/2004

Description:   Creates objects to allow for a countdown of a certain number of bars once the 
day changes.  While counting down, the variable being returned to the chart is made the same 
color as the chart background

disclaimer: For educational purposes only! Obviously, no guarantees 
whatsoever and use at your own risk.
*************************************************/

var nbars50;
var nbars25;
var CurrentDay = null;
var B_init = false;

function barcounter_variable_class(num,nCount,nColor1,nColor2){// (# bars delayed, return value, display color, chart bg color)
 this.number_of_bars = num;
 this.zero_bar = bcount.num();
 this.nCount = nCount;
 this.color1 = nColor1;
 this.color2 = nColor2;
 this.flag =  BG;
 function BG(){
  if((bcount.num()-this.zero_bar)>=this.number_of_bars){
   setBarFgColor(this.color1, this.nCount);
  }
  else{
   setBarFgColor(this.color2, this.nCount);
  }
 }
}

var bcount;
function barcount_variable_class(){
 this.num=function(){return(1+getCurrentBarIndex()-getOldestBarIndex());}
}

function delay_MA(){
 if (getBarState() == BARSTATE_ALLBARS) {//true once during initial load and subsequent reload
  bcount = new barcount_variable_class();//bcount.num()
  setChartBG(cBgColor);
 }
 if (getBarState() == BARSTATE_NEWBAR || !B_init){
  if (getDay(0) !=CurrentDay){
   CurrentDay = getDay(0);
// @@@@@@@@@@@modify lines below only@@@@@@@@@
   nbars50 = new barcounter_variable_class(50,0,Color.red,cBgColor);//declare one for each variable you want delayed
   nbars25 = new barcounter_variable_class(25,1,Color.blue,cBgColor);// (# bars delayed, return value, display color, chart bg color)
  }
 }
 nbars25.flag();
 nbars50.flag();
}
var cBgColor = Color.white;//chart background color change to whatever you use
// @@@@@@@@@@@modify lines above  only@@@@@@@@@
//-----------include within lines outside MAIN -------------------

 
 function preMain(){
 setPriceStudy(true);
 setShowTitleParameters(false);
 setStudyTitle("barcountdown");
 setShowCursorLabel(true);
 setCursorLabelName("MA50", 0);
 setCursorLabelName("MA25", 1);
 setDefaultBarFgColor(Color.red, 0);
 setDefaultBarFgColor(Color.blue, 1);
 setDefaultBarThickness(2,0);
 setDefaultBarThickness(2,1);
}

var vMA = null;

function main(){
//-----------------------------------------------------------
delay_MA();
//-----------include within lines in MAIN--------------------

 if (vMA == null) vMA = new MAStudy(10, 0, "Close", MAStudy.SIMPLE);
 
 var vX = vMA.getValue(MAStudy.MA);
 if(vX==null||vX==0) return;

 var vX1 = vX+5;

 return new Array(vX,vX1);
} 

[€ur0z0ne-Tr@der]

MANY thanks, Steve!

I think this might be the holy grail to my problem - I'll try to implement my studies accordingly to what you have said.

Best regards,

EZ-T