Dynamic Bands

[clayb1]

Is there an efs available which will allow me to draw horizontal lines a predefined number of ticks above and below the current price, and update as the current price changes ? If not, are there any examples of something similar which I might be able to modify ? TIA

[ACM]

clayb1
The enclosed efs will draw in real time horizontal lines at user defined values above and below the current price. Default values are ±0.10 and ±0.25 and can be modified through Edit Studies.
Alex

function preMain() {

    setPriceStudy(true);
    setStudyTitle("Lines");
    setCursorLabelName("Line1",0);
    setCursorLabelName("Line1",1);
    setCursorLabelName("Line1",2);
    setCursorLabelName("Line1",3);
    
    var fp1 = new FunctionParameter("Upper2", FunctionParameter.NUMBER);
    fp1.setLowerLimit(0);        
    fp1.setDefault(0.25);
    
    var fp2 = new FunctionParameter("Upper1", FunctionParameter.NUMBER);
    fp2.setLowerLimit(0);        
    fp2.setDefault(0.10);
    
    var fp3 = new FunctionParameter("Lower1", FunctionParameter.NUMBER);
    fp3.setLowerLimit(0);        
    fp3.setDefault(0.10);
    
    var fp4 = new FunctionParameter("Lower2", FunctionParameter.NUMBER);
    fp4.setLowerLimit(0);        
    fp4.setDefault(0.25);    
}

function main(Upper2,Upper1,Lower1,Lower2) {

    clearLineTool(LineTool.HORZ);

    var U2 = close()+Upper2;
    var U1 = close()+Upper1;
    var L1 = close()-Lower1;
    var L2 = close()-Lower2;
    
    addLineTool(LineTool.HORZ, U2, 1, Color.blue, "Up2");
    addLineTool(LineTool.HORZ, U1, 1, Color.blue, "Up1");
    addLineTool(LineTool.HORZ, L1, 1, Color.red, "Lo1");
    addLineTool(LineTool.HORZ, L2, 1, Color.red, "Lo2");

    return new Array (formatPriceNumber(U2),formatPriceNumber(U1),
                      formatPriceNumber(L1),formatPriceNumber(L2));
} 

[clayb1]

Great - that's exactly what I needed. Thank you !

[ACM]

clayb1
You are most welcome
Alex

[JIMMYZ]

Is there a way to post these but instead of current price it uses the first hour high or low and posts the bands .10 or .25 cents above and below that? Thanks for all your help.

[ACM]

JIMMYZ
Click here and you will find an efs that computes the High and Low of the first nn minutes.
In it you can then easily transfer the commands to plot the horizontal lines replacing close() in the variables U2, U1, etc with vHigh and vLow which are the high and low set by the other efs.
Alex

[JIMMYZ]

thanks for the info alex. I am trying to work out the kinks with what I substituted. I used vhigh and vlow but I keep on getting error messages for not defining u1 even though its no longer in the formula. I appreciate all your efforts.

[ACM]

JIMMYZ
Post the efs with the modifications you have applied and I will try to walk you through correcting the errors
Alex

[JIMMYZ]

Thanks alex,

here goes...

function preMain() {

    setPriceStudy(true);
    setStudyTitle("Lines");
    setCursorLabelName("Line1",0);
    setCursorLabelName("Line1",1);
    setCursorLabelName("Line1",2);
    setCursorLabelName("Line1",3);
    
    var fp1 = new FunctionParameter("Upper2", FunctionParameter.NUMBER);
    fp1.setLowerLimit(0);        
    fp1.setDefault(0.25);
    
    var fp2 = new FunctionParameter("Upper1", FunctionParameter.NUMBER);
    fp2.setLowerLimit(0);        
    fp2.setDefault(0.10);
    
    var fp3 = new FunctionParameter("Lower1", FunctionParameter.NUMBER);
    fp3.setLowerLimit(0);        
    fp3.setDefault(0.10);
    
    var fp4 = new FunctionParameter("Lower2", FunctionParameter.NUMBER);
    fp4.setLowerLimit(0);        
    fp4.setDefault(0.25);    
}

function main(Upper2,Upper1,Lower1,Lower2) {

    clearLineTool(LineTool.HORZ);

    var U2 = close()+Upper2;
    var vHigh = close()+Upper1;
    var vLow = close()-Lower1;
    var L2 = close()-Lower2;
    
    addLineTool(LineTool.HORZ, U2, 1, Color.blue, "Up2");
    addLineTool(LineTool.HORZ, vHigh, 1, Color.blue, "Up1");
    addLineTool(LineTool.HORZ, vLow, 1, Color.red, "Lo1");
    addLineTool(LineTool.HORZ, L2, 1, Color.red, "Lo2");

    return new Array (formatPriceNumber(U2),formatPriceNumber(vHigh),
                      formatPriceNumber(vLow),formatPriceNumber(L2));
} 

If I did not want to use U2 and L2 would I just eliminate them?

[ACM]

JIMMYZ
Unless I misunderstood what you are trying to accomplish the efs you just posted will not do that.
You need to transfer the logic to draw the lines into the efs I indicated in my prior message else you have no way of determining the High and Low of the first nn minutes (which is what the other efs computes).
Once you have transferred the logic then you substitute close() with vHigh and vLow which are variables of the other efs
Alex

[JIMMYZ]

Ok I will try to blend the two together and see if I can make it work. Thanks.

[JIMMYZ]

Here is my effort and it will just draw the high and low without the addition and it only draws the horizontal lines only till 10:30 and then they stop. What could I be doing wrong? I'm dying to know where the logic flaw is in my thinking.

function preMain() {

    setPriceStudy(true);
    setStudyTitle("Lines");
    setCursorLabelName("Line1",1);
    setCursorLabelName("Line1",2);
    setPlotType(PLOTTYPE_FLATLINES,0);
    setPlotType(PLOTTYPE_FLATLINES,1);
    setDefaultBarFgColor(Color.blue,0);
    setDefaultBarFgColor(Color.red,1);
    
    var fp1 = new FunctionParameter("Start", FunctionParameter.NUMBER);
    fp1.setDefault(930);
    
    var fp2 = new FunctionParameter("End", FunctionParameter.NUMBER);
    fp2.setDefault(1030);
    
    var fp3 = new FunctionParameter("Upper1", FunctionParameter.NUMBER);
    fp3.setLowerLimit(0);        
    fp3.setDefault(0.25);
    
    var fp4 = new FunctionParameter("Lower1", FunctionParameter.NUMBER);
    fp4.setLowerLimit(0);        
    fp4.setDefault(0.25);
}

var vFlag = true;
var vFlag2 = true
var vHigh = null;
var vLow = null;
var vClose = null;
var vDay1 = null;
var vDay2 = null;

function main(Upper1,Lower1,Start,End) {

    if (getBarState() == BARSTATE_NEWBAR) {
        if (vDay1 == null) {
            vDay2 = getDay(0);
        } else {
            vDay2 = vDay1;
        }
        vDay1 = getDay(0);
        if (vDay1 != vDay2) {
            vHigh = null;
            vLow = null;
            vFlag = true;
            vFlag2 = false;
        }
        var vHour1 = (getHour()*100)+getMinute();
        if(vHour1 >= Start){
        vFlag2=true;
        }
        var vHour = (getHour()*100)+getMinute();
        if (vHour >= End) {
            vFlag = false;
            vFlag2=false
        }
    }

    if (vFlag == true&&vFlag2==true) {
        if (vHigh == null) {
            vHigh = high(0);
        }
        if (vLow == null) {
            vLow = low(0);
        }
        vHigh = Math.max(high(0), vHigh);
        vLow = Math.min(low(0), vLow);
        vClose = close(0);
    
    
    return new Array(vHigh,vLow);
}   
    clearLineTool(LineTool.HORZ);
    
    var U1 = vHigh()+Upper1;
    var L1 = vLow()-Lower1;
        
    addLineTool(LineTool.HORZ, U1, 1, Color.blue, "Up1");
    addLineTool(LineTool.HORZ, L1, 1, Color.red, "Lo1");
    
    return new Array (formatPriceNumber(U1),formatPriceNumber(L1));
} 

[dloomis]

Here is how I did it once.

var sTime=930;
var eTime=1000;
var trendHigh=0;
var trendLow=0;
var tag=0;
var doorbell=0;
var door = 0;
var end1=0;

function preMain(){

debugClear();

setPriceStudy(true);
setStudyTitle("RangeHandL");
setCursorLabelName("rangeH", 0);
setCursorLabelName("rangeL", 1);
setDefaultBarStyle(PS_SOLID, 0);
setDefaultBarStyle(PS_SOLID, 1);
setDefaultBarFgColor(Color.green, 0);
setDefaultBarFgColor(Color.red, 1);
setDefaultBarThickness(3, 0);
setDefaultBarThickness(3, 1);
setPlotType(PLOTTYPE_SQUAREWAVE, 0);
setPlotType(PLOTTYPE_SQUAREWAVE, 1);

var fp1 = new FunctionParameter("sTime", FunctionParameter.NUMBER);
fp1.setName("sTime"); fp1.setLowerLimit(0); fp1.setDefault(930);

var fp2 = new FunctionParameter("eTime", FunctionParameter.NUMBER);
fp2.setName("eTime"); fp2.setLowerLimit(0); fp2.setDefault(1000);
}

function main(sTime, eTime){

mktTime=getHour()*100+getMinute()*1;

if(sTime==null) sTime=930;
if(eTime==null) eTime=1000;

if(mktTime*1==sTime*1){
tag=0;
trendHigh=open();
trendLow=open();
doorbell=0;
door=0;
end1 = 0;
}

if(mktTime>=sTime && mktTime < eTime){

if(high()>trendHigh)
trendHigh=high()

if(low()<trendLow)
trendLow=low()

setBarFgColor(Color.green, 0);
setBarFgColor(Color.red, 1);
setBarThickness(1, 0);
setBarThickness(1, 1);

}

return new Array(trendHigh, trendLow);
}

[ACM]

JIMMYZ
Here is the efs corrected of the errors.
FYI you can apply the same changes to the script David Loomis posted and obtain similar results. The only thing you will need to change are the names of the variables used (trendHigh instead of vHigh, etc).
Alex

[JIMMYZ]

Thanks a million! I appreciate all your effort and for taking the time in correcting my errors. I try to get better as I go along and will try to give back information if and when I can.