Bands based on Open Price

[ferret]

I am trying to adapt the efs for todays Open (user time specified) to include upper and lower bands based on a user specified amount.
I.e open @ 9:00 (user specified) = 120.50
up band (user specified) = .50 , hence plots a line at 121.00 for the day
lower band (user specified) = -.50 , plots line at 120.00 for the day

I am useless at code! can someone help? I think this should be rather simple.

Thanks in advance.

[waynecd]

try:

function preMain() {
    var aFPArray = new Array();
    setPriceStudy(true);
    setCursorLabelName("TodayOpen");

    var x=0;
    aFPArray[x] = new FunctionParameter("UserTime", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Start Time For Open (2300)");
        setLowerLimit(0);        
        setUpperLimit(2400);        
        setDefault(900);
    }
    aFPArray[x] = new FunctionParameter("LineLen", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Line Length");
        setLowerLimit(1);        
        setDefault(100);
    }
    aFPArray[x] = new FunctionParameter("LineOfffset", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Line Offset");
        setLowerLimit(0);        
        setDefault(.5);
    }
    aFPArray[x] = new FunctionParameter("TodayOnly", FunctionParameter.BOOLEAN);
    with(aFPArray[x++]){
        setDefault(true);
    }
}

function main(UserTime,LineLen,LineOfffset,TodayOnly) {
    var xOpen  = LineTag = null;
    if(TodayOnly) LineTag = 105;
    else LineTag = gID();
    if(isMonthly() || isWeekly() || isDaily()) return;
    if((hour(0)*100)+minute(0)==UserTime){
        drawLineRelative( 0, open(0)+LineOfffset, LineLen, open(0)+LineOfffset, PS_SOLID, 2, Color.blue, "Up"+LineTag ); 
        drawLineRelative( 0, open(0), LineLen, open(0), PS_SOLID, 2, Color.red, "OpenMid"+LineTag ); 
        drawLineRelative( 0, open(0)-LineOfffset, LineLen, open(0)-LineOfffset, PS_SOLID, 2, Color.blue, "Lo"+LineTag ); 
    }
}
var grID = 0;
function gID() {
    grID ++;
    return( grID );
} 

Wayne

[ferret]

Hi Wayne
thanks , that works great! The only thing that would be really useful is to have it plot on previous days, is there a way to do that?
thanks

[ferret]

I changed the true to false in and that worked! so thanks again.

[waynecd]

yw.

The reason I added a "TodayOnly" option is that draw functions (drawtext..., drawshape..., etc) eat up alot of memory and if abused can cause eSignal to freeze (at least that is my experience) so I suggest the time template include only the needed # of days.

Wayne

[ferret]

I'm trying to get the value of the bands to display on the y axis, I have all the various display options in the settings correct, is there something that needs to be added to the code?
Many thanks

[waynecd]

Hi,

drawLineRelative won't plot on the y axis scale, just on the chart itself.
If you just want to see the price, try this:

//http://forum.esignal.com/showthread.php?38494-Bands-based-on-Open-Price
function preMain() {
    var aFPArray = new Array();
    setPriceStudy(true);
    setCursorLabelName("TodayOpen");

    var x=0;
    aFPArray[x] = new FunctionParameter("UserTime", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Start Time For Open (2300)");
        setLowerLimit(0);        
        setUpperLimit(2400);        
        setDefault(900);
    }
    aFPArray[x] = new FunctionParameter("LineLen", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Line Length");
        setLowerLimit(1);        
        setDefault(100);
    }
    aFPArray[x] = new FunctionParameter("LineOffset", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Line Offset");
        setLowerLimit(0);        
        setDefault(.5);
    }
    aFPArray[x] = new FunctionParameter("TodayOnly", FunctionParameter.BOOLEAN);
    with(aFPArray[x++]){
        setDefault(true);
    }
    aFPArray[x] = new FunctionParameter("PriceOffset", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Price Offset");
        setLowerLimit(0);        
        setDefault(3);
    }
    aFPArray[x] = new FunctionParameter("plotPrice", FunctionParameter.STRING);
    with(aFPArray[x++]){
        setName("Plot Price At");
        addOption("Open Only");
        addOption("Open & Offset");
        addOption("Offset Only");
        addOption("None");
        setDefault("Open & Offset");
    }
}
var nPrice=0;
function main(UserTime,LineLen,LineOffset,TodayOnly,plotPrice,PriceOffset) {
    var xOpen  = LineTag = null;
    if(TodayOnly) LineTag = 105;
    else LineTag = gID();
    if(isMonthly() || isWeekly() || isDaily()) return;
    if((hour(0)*100)+minute(0)==UserTime){
        nPrice = open(0);
        drawLineRelative( 0, open(0)+LineOffset, LineLen, open(0)+LineOffset, PS_SOLID, 2, Color.blue, "Up"+LineTag ); 
        drawLineRelative( 0, open(0), LineLen, open(0), PS_SOLID, 2, Color.red, "OpenMid"+LineTag ); 
        drawLineRelative( 0, open(0)-LineOffset, LineLen, open(0)-LineOffset, PS_SOLID, 2, Color.blue, "Lo"+LineTag ); 
    }
    if(plotPrice.indexOf("Open")!=-1) drawTextRelative(PriceOffset, nPrice, nPrice, Color.red, null, Text.BOLD | Text.LEFT | Text.VCENTER, null, 12, "TimeP");
    if(plotPrice.indexOf("Offset")!=-1){
        drawTextRelative(PriceOffset, nPrice+LineOffset, nPrice+LineOffset, Color.blue, null, Text.BOLD | Text.LEFT | Text.VCENTER, null, 12, "TimeP_H");
        drawTextRelative(PriceOffset, nPrice-LineOffset, nPrice-LineOffset, Color.blue, null, Text.BOLD | Text.LEFT | Text.VCENTER, null, 12, "TimeP_L");
    }
}
var grID = 0;
function gID() {
    grID ++;
    return( grID );
} 

Wayne

[ferret]

thanks ever so much that worked a treat!

[waynecd]

yw

Wayne

[ferret]

Hi wayne, I'm back again! the band values generated dont seem to appear in the data window, is this an easy thing to add?
many thanks
Daniel

[waynecd]

Hi wayne, I'm back again! the band values generated dont seem to appear in the data window, is this an easy thing to add?
many thanks
Daniel

//http://forum.esignal.com/showthread.php?38494-Bands-based-on-Open-Price
function preMain() {
    var aFPArray = new Array();
    setPriceStudy(true);
    setCursorLabelName("TodayOpen+Offset",0);
    setCursorLabelName("TodayOpen",1);
    setCursorLabelName("TodayOpen-Offset",2);
    setDefaultBarThickness(2, 0);
    setDefaultBarThickness(2, 1);
    setDefaultBarThickness(2, 2);

    var x=0;
    aFPArray[x] = new FunctionParameter("User_S_Time", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Start Time For Open (900)");
        setLowerLimit(0);        
        setUpperLimit(2400);        
        setDefault(900);
    }
    aFPArray[x] = new FunctionParameter("User_E_Time", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("End Time For Open (1630)");
        setLowerLimit(0);        
        setUpperLimit(2400);        
        setDefault(1630);
    }
    aFPArray[x] = new FunctionParameter("LineOffset", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Line Offset in Ticks");
        setLowerLimit(0);        
        setDefault(2);
    }
    aFPArray[x] = new FunctionParameter("TodayOnly", FunctionParameter.BOOLEAN);
    with(aFPArray[x++]){
        setDefault(true);
    }
}
var bInit = false;
var drawIt=false;
var nPrice=0;
var aa=bb=cc=0;
function main(User_S_Time,User_E_Time,LineOffset,TodayOnly) {
    if(isMonthly() || isWeekly() || isDaily()) return;
    var nState = getBarState();
    var xOpen  = null;
    var clr1=getChartBG();
    var clr2=getChartBG();
    var lnOff = LineOffset * getMinTick();
    if(!bInit){
        if(User_S_Time>User_E_Time){
            displayError(10, 50, "Error: End Time is greater that Start Time.", "T2");
        }
        bInit=true;
    }
    if(nState==BARSTATE_ALLBARS){
        bCurrentDay=false;
    }
    if(!bCurrentDay && getDay(0) != getDay(-1)){
        var xTime = getValue("time");
        var xDate = new Date();
        var sTime = (xTime.getMonth()+1+"/"+xTime.getDate()+"/"+xTime.getFullYear());
        var sToday = (xDate.getMonth()+1+"/"+xDate.getDate()+"/"+xDate.getFullYear());
        if(sTime == sToday){
            bCurrentDay = true;
        }
        if(!bCurrentDay){
            return;
        }
    }
    if(TodayOnly){
        if(bCurrentDay){
            if((hour(0)*100)+minute(0)==User_S_Time){
                nPrice = open(0);
                drawIt=true;
            }
        }else{
            clr1=getChartBG();
            clr2=getChartBG();
        }
    }else{
        if((hour(0)*100)+minute(0)==User_S_Time){
            nPrice = open(0);
            drawIt=true;
        }
        if((hour(0)*100)+minute(0)>=User_E_Time){
            nPrice = 0;
            drawIt=false;
        }
    }
    if(drawIt){
        if(nPrice!=0){
            bb=nPrice;
            aa=bb+lnOff;
            cc=bb-lnOff;
            clr1=Color.blue;
            clr2=Color.magenta
        }
    }
    setBarFgColor(clr1,0);
    setBarFgColor(clr2,1);
    setBarFgColor(clr1,2);

    return [aa,bb,cc];
}
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, "xError"+lbl);
} 

or

//http://forum.esignal.com/showthread.php?38494-Bands-based-on-Open-Price
function preMain() {
    var aFPArray = new Array();
    setPriceStudy(true);
    setCursorLabelName("TodayOpen+Offset",0);
    setCursorLabelName("TodayOpen",1);
    setCursorLabelName("TodayOpen-Offset",2);
    setDefaultBarThickness(2, 0);
    setDefaultBarThickness(2, 1);
    setDefaultBarThickness(2, 2);

    var x=0;
    aFPArray[x] = new FunctionParameter("User_S_Time", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Start Time For Open (900)");
        setLowerLimit(0);        
        setUpperLimit(2400);        
        setDefault(900);
    }
    aFPArray[x] = new FunctionParameter("User_E_Time", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("End Time For Open (1630)");
        setLowerLimit(0);        
        setUpperLimit(2400);        
        setDefault(1630);
    }
    aFPArray[x] = new FunctionParameter("LineOffset", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Line Offset in Ticks");
        setLowerLimit(0);        
        setDefault(2);
    }
    aFPArray[x] = new FunctionParameter("TodayOnly", FunctionParameter.BOOLEAN);
    with(aFPArray[x++]){
        setDefault(true);
    }
    aFPArray[x] = new FunctionParameter("PriceOffset", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setName("Price Offset");
        setLowerLimit(0);        
        setDefault(3);
    }
    aFPArray[x] = new FunctionParameter("plotPrice", FunctionParameter.STRING);
    with(aFPArray[x++]){
        setName("Plot Price At");
        addOption("Open Only");
        addOption("Open & Offset");
        addOption("Offset Only");
        addOption("None");
        setDefault("Open & Offset");
    }
    aFPArray[x] = new FunctionParameter("drawOpenTxt", FunctionParameter.BOOLEAN);
    with(aFPArray[x++]){
        setDefault(false);
    }
    aFPArray[x] = new FunctionParameter("OpenTxtFont", FunctionParameter.NUMBER);
    with(aFPArray[x++]){
        setLowerLimit(5);
        setDefault(10);
    }
}
var drawIt=false;
var nPrice=0;
var aa=bb=cc=0;
function main(User_S_Time,User_E_Time,LineOffset,TodayOnly,plotPrice,PriceOffset,drawOpenTxt,OpenTxtFont) {
    if(isMonthly() || isWeekly() || isDaily()) return;
    var nState = getBarState();
    var xOpen  = null;
    var clr1=getChartBG();
    var clr2=getChartBG();
    var lnOff = LineOffset * getMinTick();
    if(nState==BARSTATE_ALLBARS){
        bCurrentDay=false;
    }
    if(!bCurrentDay && getDay(0) != getDay(-1)){
        var xTime = getValue("time");
        var xDate = new Date();
        var sTime = (xTime.getMonth()+1+"/"+xTime.getDate()+"/"+xTime.getFullYear());
        var sToday = (xDate.getMonth()+1+"/"+xDate.getDate()+"/"+xDate.getFullYear());
        if(sTime == sToday){
            bCurrentDay = true;
        }
        if(!bCurrentDay){
            return;
        }
    }
    if(TodayOnly){
        if(bCurrentDay){
            if((hour(0)*100)+minute(0)==User_S_Time){
                nPrice = open(0);
                drawIt=true;
            }
        }else{
            clr1=getChartBG();
            clr2=getChartBG();
        }
    }else{
        if((hour(0)*100)+minute(0)==User_S_Time){
            nPrice = open(0);
            drawIt=true;
        }
        if((hour(0)*100)+minute(0)>=User_E_Time){
            nPrice = 0;
            drawIt=false;
        }
    }
    if(drawIt){
        if(nPrice!=0){
            bb=nPrice;
            aa=bb+lnOff;
            cc=bb-lnOff;
            clr1=Color.blue;
            clr2=Color.magenta
            if(drawOpenTxt){
                if(plotPrice.indexOf("Open")!=-1) drawTextRelative(PriceOffset, bb, bb, clr2, null, Text.BOLD | Text.LEFT | Text.VCENTER, null, OpenTxtFont, "TimeP");
                if(plotPrice.indexOf("Offset")!=-1){
                    drawTextRelative(PriceOffset, aa, aa, clr1, null, Text.BOLD | Text.LEFT | Text.VCENTER, null, OpenTxtFont, "TimeP_H");
                    drawTextRelative(PriceOffset, cc, cc, clr1, null, Text.BOLD | Text.LEFT | Text.VCENTER, null, OpenTxtFont, "TimeP_L");
                }
            }
        }
    }
    setBarFgColor(clr1,0);
    setBarFgColor(clr2,1);
    setBarFgColor(clr1,2);

    return [aa,bb,cc];
} 

Wayne

[ferret]

Wayne thats great thank you! Would this be difficlut to adapt in to a trade system that can be back tested. i.e if high is > upper band then do short, cover @open?

[waynecd]

In the thread: http://forum.esignal.com/showthread....117#post146117
Alexis Montenegro lists resources that will help you learn efs study development. For strategy development resources do a knowledgebase search for "strategy".

A second alternative is to hire a the professional programmer. A link can be found here: http://forum.esignal.com/showthread....om-study-built

Good luck.

Wayne