previous day high/low

[Beebers]

I am new to Esignal (coming from a Tradestation background).

I have noticed that those OHLC efs files are not accurate when plotted on the index futures. E.g. today, the "Todays Open.efs" will plot the open of the SP500 emini at 1452.5 whereas it opened at 1451.75. I wonder if it looks at the first open price on globex (midnight) rather than the Chicago opening.

The same discrepancies occur with Previous days high and low indicators. I also assume that it uses data from after the Chicago closing .....

Is there any way to rectify this? How can I plot the opening data from the 8:30 am CST bar?

Also, how could I limit this indicator to only use data which occurs between 8:30 am CST and 3:15 CST?

Thanks.

[ACM]

Beebers
As far as I can see those are the correct values (see enclosed screenshot taken from the CME site).
The ES symbol includes the complete session starting from 15:30 CT (or 17:00 on Sundays) to 15:15 CT of the following day.
To plot the "pit session" data only add an =2 to the symbol ie ES H7=2 (or ES #F=2 for the continuous). Note that the =2 symbols are not available for all futures.
Alex

[Beebers]

Very interesting. Thank you.

Here a screenshot of a comparison of the opening price (in yellow).

The lower chart uses your suggested ES H7=2 symbol and shows an opening price of 1451.50
The upper chart uses a time template to display only 6:30 am till 1:15 pm (PST). It shows 1452.5 as its opening price, a price which doesn't show up on the bar.

[ACM]

Beebers
The reason you are seeing 1452.50 even when the Time Template is set to display only the "pit session" times is because the efs you are using references the daily bar and not the data that is being charted. The Open on the daily bar for ES H7 is 1452.50
Alex

[Beebers]

Thank you Alexis,

I guess I will have to somehow come up with my own version for an opening line. I have browsed through some of Esignal's libraries which would let me define which intraday bar to access in order to plot an opening price, something like, the 6:30 PST bar, or the first bar on today's chart.

So far I have not found anything yet. If you have any suggestions, I would greatly appreciate any pointers you might have.

Thanks.

[ACM]

Beebers
There are several ways to accomplish that. Some examples are enclosed below
Alex

//Example 1- this example assumes you are using a Time Template based on "pit seession" only 
//declare a global variable ie outside of main() or preMain() and set it initially to null
var myOpen = null;

//then in main() you can use 
if(getBarState()==BARSTATE_NEWBAR && day(0)!=day(-1)){//if this is the first tick of a new bar AND 
                                                      //the bar date is different from previous bar's date
    myOpen = open(0);//set the variable myOpen to the Open of this bar
}

//Example 2
//declare a global variable ie outside of main() or preMain() and set it initially to null
var myOpen = null;

//then in main() you can use 
if(getBarState()==BARSTATE_NEWBAR && (hour(0)*100)+minute(0)==930){//if this is the first tick of a new bar AND 
                                                                   //the bar time is 930
    myOpen = open(0);//set the variable myOpen to the Open of this bar
} 

[Beebers]

Alexis,

Thank you for your answer. I have tried both of your suggestion but always get an error which says

"Parameter Number 0 of Function getSeries is invalid.

Here the code

------------------------------------
var myOpen = null

function preMain() {
setPriceStudy(true);
setStudyTitle('Beebs Open');
setCursorLabelName('O');

setDefaultBarStyle(PS_DASH);
setDefaultBarFgColor(Color.yellow);
setDefaultBarThickness(2);
setPlotType(PLOTTYPE_FLATLINES);
}

var bInit = false;

function main () {

if(isMonthly() ||isWeekly() || isDaily())
return;

if (bInit == false){
if(getBarState()==BARSTATE_NEWBAR && (hour(0)*100)+minute(0)==930){
myOpen = open(0 }
bInit = true;

var vOpen = getSeries(myOpen);

return (vOpen);

}}

[Beebers]

The code didn't paste correctly.

Here again ....

---------------------

var myOpen = null

function preMain() {
setPriceStudy(true);
setStudyTitle('Beebs Open');
setCursorLabelName('O');

setDefaultBarStyle(PS_DASH);
setDefaultBarFgColor(Color.yellow);
setDefaultBarThickness(2);
setPlotType(PLOTTYPE_FLATLINES);
}

var bInit = false;

function main () {

if(isMonthly() ||isWeekly() || isDaily())
return;

if (bInit == false){
if(getBarState()==BARSTATE_NEWBAR && (hour(0)*100)+minute(0)==930){
myOpen = open(0);
}
bInit = true;

var vOpen = getSeries(myOpen);

return (vOpen);

}}

[ACM]

Beebers
That error is due to the fact that myOpen is not a series but a value.
Enclosed below is a corrected version of your script (with some comments) and a chart showing the plot
Alex

var myOpen = null

function preMain() {
    setPriceStudy(true);
    setStudyTitle('Beebs Open');
    setCursorLabelName('O');

    setDefaultBarStyle(PS_DASH);
    setDefaultBarFgColor(Color.yellow);
    setDefaultBarThickness(2);
    setPlotType(PLOTTYPE_FLATLINES);
}

//var bInit = false; ->not required

function main () {

    if(isMonthly() ||isWeekly() || isDaily())
    return;

    //if (bInit == false){ ->this would prevent the following condition to execute more than once
    if(getBarState()==BARSTATE_NEWBAR && (hour(0)*100)+minute(0)==930){
        myOpen = open(0);//open(0) is the value at the current bar of the open() series
    }
    //bInit = true; ->not required

    //var vOpen = getSeries(myOpen);//myOpen is not a series but a value

    return myOpen;//(vOpen); -> vOpen is not valid
}//} ->redundant closing bracket 

[Beebers]

Alex, you made my day. Thank you.

[ACM]

Beebers
You are most welcome.
Alex