When getOpen is not defined because of missing bar(s), how to get around it.

[WantToLearn]

I have a chart showing SUN=N. For those that don't know, the =N is for data on the NYSE only. I am looking at the opening price (bar) for stocks on the NYSE only.

Here is the problem, sometimes the stock opens at 9:30 EST, sometimes it can take 10 minutes or longer before it officially opens on the NYSE. This causes a problem in my program beause there is no bar(s) until it opens. So I tell my program to open(0) at 9:30 AM and there is no bar it gives me this error message: "ReferenceError: getOpen is not defined"

I know this is easy for most of you but I have spent hours searching and can not find an asnwer. Any help would be appreciated.

My code (lines 19 an 27 cause the problems, highlighted with //******)

debugClear()

function preMain() {
    setPriceStudy(true);
    setStudyTitle("Rick's First Hour");
}
    
var stockOpen = null;
    
function main() {
    var ibarHour = getHour(0);
    var ibarMinute = getMinute(0);
    var ibarHrMin = ((getHour(0) * 100) + getMinute(0));
    var ibarDay = getDay(0);
    var ibarMonth = getMonth(0);
    var ibarYear = getYear(0);
    
    if (ibarHrMin >= 930 && ibarHrMin <= 935) {
        if(getOpen(0) == undefined || getOpen(0) == null); return  //******
        stockOpen = getOpen(0);
        MaxPrice = getOpen(0);
        MinPrice = getOpen(0);        
    }
    
    if (ibarHrMin >= 931 && ibarHrMin <= 1000) {
        barTime = (getHour(0) * 100) + getMinute(0);
        if(getOpen(0) == undefined || getOpen(0) == null); return   //******
        curPrice = getOpen(0);
        if(curPrice > MaxPrice) {
            MaxPrice = curPrice;
            MaxPrice1 = curPrice - stockOpen;
        }
        
        if(open(0) < MinPrice) {
            MinPrice = curPrice;
            MinPrice1 = curPrice - stockOpen;
            MinTime = barTime;
        }
    debugPrintln(ibarDay," Day= ",ibarMonth," Month= ",ibarYear,"  Year= ",stockOpen," stockOpen= ",MaxPrice1, "MaxPr= ");
    }    
} 

[waynecd]

Just at a glance, try replacing;

getOpen(0) 

with:

open(0) 

Then add a global variable named "MaxPrice1 = null;" outside of main as:

var stockOpen = null;
var MaxPrice1 = null;
    
function main() {
... 

I would also comment out:

...
        //if(open(0) == undefined || open(0) == null); return  //******

...
        //if(open(0) == undefined || open(0) == null); return   //******

... 

Wayne

[WantToLearn]

Yes, it works. Thank you Wayne!! Guess I need to understand the differences between getOpen() and open(). I will research it.

Once again, thank you for taking the time to explain it.
Jack

[waynecd]

Glad it worked.

"getOpen() " is not an efs function.

Consider a study of the following tutorials:

http://kb.esignalcentral.com/display/2/index.aspx?c=12&cpc=ULwO0A442oKs512Q04X5j0UupP4SveI6dt2WJi7&cid=4&cat=&catURL=&r=0.170301139354706

and the knowledge base:

http://kb.esignalcentral.com/article.asp?article=1206&p=4

and KB searches:

http://kb.esignalcentral.com/display/2/index.aspx?c=12&cpc=ULwO0A442oKs512Q04X5j0UupP4SveI6dt2WJi7&cid=4&cat=&catURL=&r=0.060576856136322

Also, SteveHare2003 lists javascript links that I have found to be very useful. See one of his posts at:

http://forum.esignal.com/showthread.php?s=&postid=137262#post137262

Wayne