Cursor Values w/out drawing lines on Price Chart

[fish7]

I have the following EFS that draws an orange line at the mid-point of every candle on the price chart. I want the value of the midpoint also reported back to the cursor window, so it shows when I put the mouse over the bar (hence the last line is "return (MidPoint)". However, when I do this to get the MidPoint reported back into the Cursor Window, the EFS also draws a blue line connecting the midpoints of each candle. How do I get the EFS to NOT draw that blue connecting line, while still getting my orange MidPoint lines on the chart AND getting the MidPoint value reported back into the cursor window?

=====================================

var MidPoint = 0;

function preMain() {
setComputeOnClose(true);
setPriceStudy(true);
setStudyTitle("MidPoint");
setCursorLabelName("MidPoint");
}


//=========================================
function main () {

MidPoint = 0.5*(high() + low()); // Average of High and Low

drawLineRelative(7, MidPoint, 0, MidPoint, PS_SOLID, 1, Color.RGB(255,155,0), "MPB"+getCurrentBarCount());

return (MidPoint);
}

Hi f1sh7,

To accomplish this, convert the value in the return statement to a string. I marked up your efs with two ways to accomplish this, along with making some other small changes.

//=====================================

var MidPoint = 0;

function preMain() {
setComputeOnClose(true); 
setPriceStudy(true);
setStudyTitle("MidPoint");
setCursorLabelName("MidPoint",0);
setDefaultBarFgColor(Color.RGB(255,155,0), 0);
}


//=========================================
function main () {

MidPoint = 0.5*(high(0) + low(0)); // Average of High and Low

drawLineRelative(7, MidPoint, 0, MidPoint, PS_SOLID, 1, Color.RGB(255,155,0), "MPB"+getCurrentBarCount());

//return (MidPoint); // need to convert to text
//return (MidPoint.toFixed(3));  //method 1
return (""+MidPoint);  //method 2

} 

[fish7]

Thank you

That is perfect....

THANK YOU!

JOHN

[buzzhorton]

Want to alert if previous middle is crossed

I want to be alerted (intrabar) if the current price crosses the previous candle's midpoint.

How do I do that?

Thanking You in Advance...

Avery aka *************

************* at gmail dot com

P.S. I am a little rusty at eSignal coding... been coding on TradeStation



//=====================================

var MidPoint = 0;

function preMain() {
//setComputeOnClose(true);
setPriceStudy(true);
setStudyTitle("MidPoint");
setCursorLabelName("MidPoint",0);
setDefaultBarFgColor(Color.blue, 0);
}


//=========================================
function main () {

MidPoint = 0.5*(high(0) + low(0)); // Average of High and Low

if( MidPoint == close(0) ) {
Alert.addToList(getSymbol(), MidPoint +" MidPoint", Color.black, Color.blue);
Alert.playSound("swoosh.wav");
}

drawLineRelative( 0 , MidPoint, 1 , MidPoint, PS_SOLID, 1, Color.blue, "MPB"+getCurrentBarCount());

//return (MidPoint); // need to convert to text
//return (MidPoint.toFixed(3)); //method 1
return (""+MidPoint); //method 2

}

[ACM]

buzzhorton
In order to calculate the previous bar's midpoint you need to change this

MidPoint = 0.5*(high(0) + low(0)); 

to the following

MidPoint = 0.5*(high(-1) + low(-1)); 

Then to create an alert you need to first declare an external variable that you use to prevent the alerts from going off continuously once an event is triggered. For example

var AlertTriggered = false; 

Then at the beginning of function main() you need to add the logic to reset that variable to false at every new bar.

if(getBarState() == BARSTATE_NEWBAR){
    AlertTriggered = false;
} 

At this point you can add the logic to trigger your alert

if(AlertTriggered == false){
    if(high(-1) < Midpoint && close(0) >= Midpoint || low(-1) > Midpoint && close(0) <= Midpoint){
        Alert.playSound("ding.wav");
        AlertTriggered = true;
    }
}
//replace high(-1) and low(-1) with other price value as required 

For a complete example of how to create an alert at a specific price see this thread and for an example of how to limit the alert to only once per bar see this thread
Also if you are not familiar with programming in efs I would suggest that you review the JavaScript for EFS video series. That will provide you with a thorough introduction to programming in JavaScript which is at the foundation of EFS. Then go through the EFS KnowledgeBase and study the Help Guides and Tutorials which will provide you with the specifics of EFS.
Alex

[buzzhorton]

Thank you.

I think I figured it out...

function preMain() {


    setStudyTitle("TRO_60MIN_MIDDLE_FX ");
    setPriceStudy(true);
    setCursorLabelName("High", 0);


    setCursorLabelName("Mid", 1);

    setCursorLabelName("Low", 2);

    setCursorLabelName("PrevMid", 3);

    setDefaultBarFgColor(Color.red, 0);

    setDefaultBarFgColor(Color.cyan, 1);
    setDefaultBarFgColor(Color.blue, 2);

    setDefaultBarFgColor(Color.magenta, 3);
}

function main(nNumDays) {

    if (nNumDays == null)
        nNumDays = 1;
   


var xHH = high(inv("60") ); //this creates the series object of the daily high

var xLL  = low(inv("60") ); //this creates the series object of the daily low

var  HH  = xHH.toFixed(4)*1 ; //this creates the series object of the daily high

var  LL  = xLL.toFixed(4)*1 ; //this creates the series object of the daily low

var xMidPoint = 0.5*( HH + LL  )  ; // Average of High and Low

Mid = xMidPoint.toFixed(4)*1   ; // Average of High and Low
        
 
 
var xPrevMid = 0.5*( xHH.getValue(-1) + xLL.getValue(-1) )  ; // Average of High and Low

PrevMid = xPrevMid.toFixed(4)*1   ; // Average of High and Low

  

    if( PrevMid == close(0) ) {
        Alert.addToList(getSymbol(), PrevMid +" PrevMid", Color.black, Color.magenta);
        Alert.playSound("chime.wav");
        }

      
    if( Mid == close(0) ) {
        Alert.addToList(getSymbol(), Mid +" Mid", Color.black, Color.cyan);
        Alert.playSound("swoosh.wav");
        } 
    
 

drawLineRelative( 0 , Mid, 1 , Mid, PS_SOLID, 1, Color.cyan, "Mid"+getCurrentBarCount());

drawLineRelative( 0 , HH, 1 , HH, PS_SOLID, 1, Color.blue, "HH"+getCurrentBarCount());

drawLineRelative( 0 , LL, 1 , LL, PS_SOLID, 1, Color.red, "LL"+getCurrentBarCount());

drawLineRelative( 0 , PrevMid, 1 , PrevMid, PS_SOLID, 1, Color.magenta, "PM"+getCurrentBarCount());



/*
debugPrintln("Hi "+HH);//this will print the current value of the series

debugPrintln("Lo "+LL);//this will print the current value of the series

debugPrintln("Mid "+Mid);//this will print the current value 
*/


return  new Array(  ""+HH,""+Mid, ""+LL, ""+PrevMid ) ;

} 

That's a version for FOREX.

Is there anyway to make studies PARAMETER driven instead of having to edit them? Remember, I have been coding in TradeStation EasyLanguage for the past 3 years or so. I am used to creating "soft coded" indicators that are parameter driven.

In this case, I would want an input variable, iDecimals, so the user could determine how many decimals the study should round to.

Also, I would want an input variable, iAlert, that could be set to true or false, so the user can turn off the alerts if they so desire.

Finally, I would want an input variable, iInterval, or auto detection by the study, so the user could specify which interval to use to determine the current and previous middle.

By the way, since this is using 60 minute bars, I do NOT want the alert to turn off. I want to know each occurence.

Thanks again for your help.

P.S. Trading in the direction of the price crossing the previous candle's middle is VERY PROFITABLE. The current middle is used as an exit when the price reverses if you haven't already taken your profit of off the table.

Daytraders can use the 60 minute interval. Swing Traders use the daily.

[ACM]

buzzhorton
Use the Function Parameter Object to set up all your parameters.
As to the decimals rather than using .toFixed() which locks you to a specific number of decimals use the formatPriceNumber() function which will adapt the display to the format of the security being charted
You can use the function getInterval() to retrieve the interval being charted and based on that assign a value to your variable eg
if(getInterval()==5) myInterval = 60;
There are also some other functions available such as isIntraday(), isDaily(), etc. I would suggest that you read through the Function Reference in the EFS KnowledgeBase
Alex

[buzzhorton]

Thanks again, Alex.

One step at a time.

First, I got formatPriceNumber to work:

var LL = formatPriceNumber(xLL)*1 ;

Next, I used:

var xInterval = getInterval() ;

Looks like it will take some work to get the parameter code installed.

I really appreciate your help, Alex.

function preMain() {




    setStudyTitle("$_Scratch ");
    setPriceStudy(true);
    setCursorLabelName("High", 0);


    setCursorLabelName("Mid", 1);

    setCursorLabelName("Low", 2);

    setCursorLabelName("PrevMid", 3);

    setDefaultBarFgColor(Color.red, 0);

    setDefaultBarFgColor(Color.cyan, 1);
    setDefaultBarFgColor(Color.blue, 2);

    setDefaultBarFgColor(Color.magenta, 3);
}

function main(nNumDays) {

    if (nNumDays == null)
        nNumDays = 1;


var xInterval = getInterval()    ;

var xHH = high(inv(xInterval) ); //this creates the series object of the daily high

var xLL  = low(inv(xInterval) ); //this creates the series object of the daily low

var  HH  = formatPriceNumber(xHH)*1 ; //this creates the series object of the daily high

var  LL  = formatPriceNumber(xLL)*1 ; //this creates the series object of the daily low

var xMidPoint = 0.5*( HH + LL  )  ; // Average of High and Low

Mid = formatPriceNumber( xMidPoint) *1   ; // Average of High and Low
        
 
 
var xPrevMid = 0.5*( xHH.getValue(-1) + xLL.getValue(-1) )  ; // Average of High and Low

PrevMid = formatPriceNumber( xPrevMid )*1   ; // Average of High and Low
    

    if( PrevMid == close(0) ) {
        Alert.addToList(getSymbol(), PrevMid +" PrevMid", Color.black, Color.magenta);
        Alert.playSound("chime.wav");
        }

      
    if( Mid == close(0) ) {
        Alert.addToList(getSymbol(), Mid +" Mid", Color.black, Color.cyan);
        Alert.playSound("swoosh.wav");
        } 
    
drawLineRelative( 0 , Mid, 1 , Mid, PS_SOLID, 1, Color.cyan, "Mid"+getCurrentBarCount());

drawLineRelative( 0 , HH, 1 , HH, PS_SOLID, 1, Color.blue, "HH"+getCurrentBarCount());

drawLineRelative( 0 , LL, 1 , LL, PS_SOLID, 1, Color.red, "LL"+getCurrentBarCount());

drawLineRelative( 0 , PrevMid, 1 , PrevMid, PS_SOLID, 1, Color.magenta, "PM"+getCurrentBarCount());



/*

debugPrintln("Hi "+HH);//this will print the current value of the series

debugPrintln("Lo "+LL);//this will print the current value of the series

debugPrintln("Mid "+Mid);//this will print the current value 

*/

return  new Array(  ""+HH,""+Mid, ""+LL, ""+PrevMid ) ;

} 

[buzzhorton]

I modified PrevDay-OHLC to include the previous day's middle and to alert when the any of the lines are crossed.

When prompted, set iAlert to false to turn sound off.

MAY ALL YOUR FILLS BE COMPLETE.

/**************************************************
Alexis C. Montenegro © April 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. 
***************************************************/

debugClear(); 

function preMain() {

    setPriceStudy(true);
    setStudyTitle("TRO_PrevDay-OHLC");
    setCursorLabelName("POpen", 0);
    setCursorLabelName("PHigh", 1);
    setCursorLabelName("PLow", 2);
    setCursorLabelName("PClose", 3);
    setCursorLabelName("PMiddle", 4);


    setDefaultBarFgColor(Color.red,0);
    setDefaultBarFgColor(Color.black,1);
    setDefaultBarFgColor(Color.black,2);
    setDefaultBarFgColor(Color.blue,3);
    setDefaultBarFgColor(Color.magenta,4);

    setDefaultBarThickness(2,0);
    setDefaultBarThickness(3,1);
    setDefaultBarThickness(3,2);
    setDefaultBarThickness(2,3);
    setDefaultBarThickness(3,4);

    setPlotType(PLOTTYPE_FLATLINES,0); // PLOTTYPE_FLATLINES
    setPlotType(PLOTTYPE_FLATLINES,1);
    setPlotType(PLOTTYPE_FLATLINES,2);
    setPlotType(PLOTTYPE_FLATLINES,3);
    setPlotType(PLOTTYPE_FLATLINES,4);

    checkVersion(1,"http://share.esignal.com/ContentRoot/ACM%20Test/Formulas/PrevDay-OHLC.efs");

}

var vOpen = null;
var vOpen1 = null;
var vHigh = null;
var vHigh1 = null;
var vLow = null;
var vLow1 = null;
var vClose1 = null;

var vMid = null;
var vMid1 = null;


 askForInput();


    var iAlert = new FunctionParameter("iAlert", FunctionParameter.BOOLEAN);
    iAlert.setDefault( true );


function main(iAlert) {

    if (close(-1)==null) 
        return;
    
    if(getBarState()==BARSTATE_NEWBAR&&getDay()!=getDay(-1)) {
        vHigh1 = vHigh;
        vLow1 = vLow;
        vOpen1 = vOpen;
        vClose1 = formatPriceNumber( close(-1) ) * 1 ;//comment out this line if using alternate vClose1 
        vMid1 = formatPriceNumber( vMid ) * 1 ;
        vHigh = high();
        vLow = low();
        vOpen=open();

    }
    
    if (vHigh == null) 
        vHigh = high();
    if (vLow == null) 
        vLow = low();
    
    vHigh = Math.max(high(), vHigh);
    vLow = Math.min(low(), vLow);
    vMid =   ( vHigh + vLow ) * .50  ;  


    //alternate vClose1 if one wants to use the daily bar Close. NOTE that this will not work with Tick Replay
    //vClose1 = call("/OHLC/getPrevOHLC.efs", "Close");    
    
    
    if (vOpen1 == null || vLow1 == null || vHigh1 == null || vClose1 == null) {
        return;
    } else {

// PREVIOUS MIDDLE ALERT 

    if(  ( high(-1) < vMid1 || low(0) < vMid1 )        && close(0) >= vMid1 ){
    Alert.addToList(getSymbol(), vMid1 +" Cross above PrevMiddle", Color.green, Color.black);
      if( iAlert == true ) Alert.playSound("ding.wav");

      debugPrint("Cross above PrevMiddle: " + formatPriceNumber( vMid1 ) + " " +  getValue( "Time" ) + "\n" ); 
     }
 
    if( ( low(-1) > vMid1 || high(0) > vMid1   )          && close(0) <= vMid1 ){
    Alert.addToList(getSymbol(), vMid1 +" Cross below PrevMiddle", Color.red, Color.black);
        if( iAlert == true ) Alert.playSound("ding.wav");

      debugPrint("Cross below PrevMiddle: " + formatPriceNumber( vMid1 ) + " " +  getValue( "Time" ) + "\n" );  
     }


// PREVIOUS High ALERT 

    if(  ( high(-1) < vHigh1 || low(0) < vHigh1 )        && close(0) >= vHigh1 ){
    Alert.addToList(getSymbol(), vHigh1 +" Cross above PrevHigh", Color.green, Color.black);
      if( iAlert == true ) Alert.playSound("ding.wav");

      debugPrint("Cross above PrevHigh: " + formatPriceNumber( vHigh1 ) + " " +  getValue( "Time" ) + "\n" ); 
     }
 
    if( ( low(-1) > vHigh1 || high(0) > vHigh1   )          && close(0) <= vHigh1 ){
    Alert.addToList(getSymbol(), vHigh1 +" Cross below PrevHigh", Color.red, Color.black);
        if( iAlert == true ) Alert.playSound("ding.wav");

      debugPrint("Cross below PrevHigh: " + formatPriceNumber( vHigh1 ) + " " +  getValue( "Time" ) + "\n" );  
     }

// PREVIOUS Low ALERT 

    if(  ( high(-1) < vLow1 || low(0) < vLow1 )        && close(0) >= vLow1 ){
    Alert.addToList(getSymbol(), vLow1 +" Cross above PrevLow", Color.green, Color.black);
      if( iAlert == true ) Alert.playSound("ding.wav");

      debugPrint("Cross above PrevLow: " + formatPriceNumber( vLow1 ) + " " +  getValue( "Time" ) + "\n" ); 
     }
 
    if( ( low(-1) > vLow1 || high(0) > vLow1   )          && close(0) <= vLow1 ){
    Alert.addToList(getSymbol(), vLow1 +" Cross below PrevLow", Color.red, Color.black);
        if( iAlert == true ) Alert.playSound("ding.wav");

      debugPrint("Cross below PrevLow: " + formatPriceNumber( vLow1 ) + " " +  getValue( "Time" ) + "\n" );  
     }

// PREVIOUS Close ALERT 

    if(  ( high(-1) < vClose1 || low(0) < vClose1 )        && close(0) >= vClose1 ){
    Alert.addToList(getSymbol(), vClose1 +" Cross above PrevClose", Color.green, Color.black);
      if( iAlert == true ) Alert.playSound("ding.wav");

      debugPrint("Cross above PrevClose: " + formatPriceNumber( vClose1 ) + " " +  getValue( "Time" ) + "\n" ); 
     }
 
    if( ( low(-1) > vClose1 || high(0) > vClose1   )          && close(0) <= vClose1 ){
    Alert.addToList(getSymbol(), vClose1 +" Cross below PrevClose", Color.red, Color.black);
        if( iAlert == true ) Alert.playSound("ding.wav");

      debugPrint("Cross below PrevClose: " + formatPriceNumber( vClose1 ) + " " +  getValue( "Time" ) + "\n" );  
     }



// PREVIOUS Open ALERT 

    if(  ( high(-1) < vOpen1 || low(0) < vOpen1 )        && close(0) >= vOpen1 ){
    Alert.addToList(getSymbol(), vOpen1 +" Cross above PrevOpen", Color.green, Color.black);
      if( iAlert == true ) Alert.playSound("ding.wav");

      debugPrint("Cross above PrevOpen: " + formatPriceNumber( vOpen1 ) + " " +  getValue( "Time" ) + "\n" ); 
     }
 
    if( ( low(-1) > vOpen1 || high(0) > vOpen1   )          && close(0) <= vOpen1 ){
    Alert.addToList(getSymbol(), vOpen1 +" Cross below PrevOpen", Color.red, Color.black);
        if( iAlert == true ) Alert.playSound("ding.wav");

      debugPrint("Cross below PrevOpen: " + formatPriceNumber( vOpen1 ) + " " +  getValue( "Time" ) + "\n" );  
     }


 if ( isLastBarOnChart() == true ) { 
      //clear the Formula Output Window 
 
      //print a line of text to that window 
      debugPrint( "The previous day's midpoint is: " + formatPriceNumber( vMid1 ) + "\n" ); 
   } 


        return new Array(vOpen1,vHigh1,vLow1,vClose1,vMid1);
    }
}