Coding start time from a previous day to current day

[rcamrn123]

I like to monitor all trading activity for emini futures such as S&P premarket. Because globex (premarket) data starts the previous calendar day and runs through midnight before start of the new trading session proper - can someone advise how to capture the beginning of the globex data.

I want to then find the high/low of this trading activity before new session start. I have attempted various coding methods and just end up starting at midnight without capturing the time from the end of previous day session right through midnight and to the beginning of new trading session so that hi/lo lines can be drawn from the exact bar when the premarket/globex session commences to when it ends.

The code that I have done so far is attached

[waynecd]

In the following code the user has to manually add the start/end times but it works over midnight. Start/end times can be 930/1630, 1700/930, etc.
I did not use your code, I'm just posting something I did a while ago that you might be able to incorporate into your original code.

inSession HL.efs
//see"inSession Hours with Midnight Time Change.efs"
//see "inSession RT Only BEST.efs"
function preMain() {
    var aFPArray = new Array();
    setPriceStudy(true);
    var x=0;
    aFPArray[x] = new FunctionParameter("StartTime", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Start Time (930)");
        setDefault(930);
    }
    aFPArray[x] = new FunctionParameter("EndTime", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("End Time (1630)");
        setDefault(1630);
    }
    aFPArray[x] = new FunctionParameter("RTM_Only", FunctionParameter.BOOLEAN);
    with(aFPArray[x++]){
        setName("Real Time Only");
        setDefault(false);
    }
    aFPArray[x] = new FunctionParameter("ColorBg", FunctionParameter.BOOLEAN);
    with(aFPArray[x++]){
        setName("Color Bg When in Session");
        setDefault(true);
    }
    aFPArray[x] = new FunctionParameter("drawLines", FunctionParameter.BOOLEAN);
    with(aFPArray[x++]){
        setName("Draw Lines at Start/End Times");
        setDefault(true);
    }
}
var startFlag=endFlag=false;
var runIt_1=false;
var sessionCtr=0;
var sessionH,sessionL;
function main(StartTime,EndTime,RTM_Only,ColorBg,drawLines){
    if(RTM_Only) if(!isLastBarOnChart()) return;
    if(StartTime==null || EndTime==null || StartTime==EndTime){
        displayError(90, 50, " Error: Start and End Times are not properly defined. Please correct. ", "T1");
        return;
    }
    var runIt = false;
    //var hms0=(((getHour(0)*100)+getMinute(0))*100)+getSecond(0);debugPrintln("24: "+hms0);
    var hms0=((getHour(0)*100)+getMinute(0))+getSecond(0);//debugPrintln("24: "+hms0+"\t"+StartTime+"\t"+EndTime+"\t"+(hms0 >= StartTime)+"\t"+(EndTime>hms0));
    var barState = getBarState();
    if(EndTime>StartTime){
        if(hms0 >= StartTime){
            if(EndTime>hms0){
                runIt = true;
            }
        }

    }else{
        if(EndTime>hms0){
            runIt = true;
            //debugPrintln("19: "+hms0+"\t"+EndTime);
        }
        if(hms0 >= StartTime){
            runIt = true;
            //debugPrintln("22: "+hms0+"\t"+(StartTime-( getInterval()*3)));
        }
    }

    if(runIt){
        //enter code here
        if(!startFlag){//marks bar when "runIt" changes to true
            sessionCtr++;
            sessionH = high(0);
            sessionL=low(0);
            if(drawLines) drawLineRelative(0,0,0,100000,PS_SOLID, 2, Color.blue, "36"+gID());
            if(hms0<EndTime) endFlag = false;
            startFlag=true;
        }
        if(high(0)>sessionH) sessionH = high(0);
        if(sessionL>low(0)) sessionL=low(0);
        if(ColorBg) setBarBgColor(Color.RGB(200,255,150),0);
    }else{
        if(hms0==EndTime || (!endFlag && sessionCtr>0)){//marks bar when "runIt" changes to false
            if(drawLines) drawLineRelative(0,0,0,100000,PS_SOLID, 2, Color.red, "78"+gID());
            startFlag=false;
            endFlag=true;
        }
    }
    return [sessionH,sessionL];
}
var grID=0;
function gID() {
    grID++;
    return (grID);
}

//== displayError function displays an error to the user
function displayError( a,b,ErrStr ,lbl) {
    removeText("xError");  
    drawTextRelative(a, b, ErrStr, Color.maroon, Color.lightgrey,  Text.FRAME | Text.ONTOP | Text.RELATIVETOLEFT | Text.RELATIVETOBOTTOM, null, 16, "lbl");    
} 

Wayne

[waynecd]

If anyone has a better way to span a session period through midnight (i.e., from 1700 thru to 900 the next day)
and is willing to post it I would really appreciate it.

Wayne

[waynecd]

debugClear();
function preMain(){
    setPriceStudy(true);
}
var StartTime=900,EndTime=1700;
//var StartTime=1700,EndTime=900;
function main(){
    return calcSession(StartTime,EndTime);
}
function calcSession(StartTime,EndTime){
    var hms0=(getHour(0)*100)+getMinute(0);
    var inSession=false;
    if(StartTime>EndTime){//1700 thru 900
        inSession=true;
        if(hms0>=EndTime && StartTime>hms0){
            //debugPrintln("16:\tv: "+hms0+"\ts: "+StartTime+"\te: "+EndTime);
            inSession=false;
        }
    }else if(hms0>=StartTime && EndTime>hms0) inSession=true;
    else if(StartTime==EndTime) inSession=true;

    //debugPrintln("23:\tv: "+hms0+"\ts: "+StartTime+"\te: "+EndTime);
    if(inSession) setBarBgColor(Color.RGB(200,255,150));
    return inSession;
} 

wayne