Lines Won't Draw

[techsigma]

Hello,

I have been playing around with indicators, and am just trying to draw a simple line based on the examples and documentation. However, I just cannot get it to draw. Nothing appears. Below is the code:

namespace NinjaTrader.NinjaScript.Indicators
{
public class TestPivot3 : Indicator
{
protected override void OnStateChange()
{
if (State == State.SetDefaults)
{
Description = @"Enter the description for your new custom Indicator here.";
Name = "TestPivot3";
Calculate = Calculate.OnBarClose;
IsOverlay = true;
DisplayInDataBox = true;
DrawOnPricePanel = true;
DrawHorizontalGridLines = true;
DrawVerticalGridLines = true;
PaintPriceMarkers = true;
ScaleJustification = NinjaTrader.Gui.Chart.ScaleJustification.Right;
//Disable this property if your indicator requires custom values that cumulate with each new market data event.
//See Help Guide for additional information.
IsSuspendedWhileInactive = true;
}
else if (State == State.Configure)
{
AddDataSeries(Data.BarsPeriodType.Minute, 1);
}
}

protected override void OnBarUpdate()
{
//Add your custom indicator logic here.
double PivotPoint = (High[1] + Low[1] + Close[1]) / 3;
Draw.Line(this, "PP" + CurrentBar, false, 10, Low[0], 0, Low[10], Brushes.LimeGreen, DashStyleHelper.Dot, 2, true);

// Draws a blue rectangle from the low 10 bars back to the high of 5 bars back
Draw.Rectangle(this, "tag1", 10, Low[10] - TickSize, 5, High[5] + TickSize, Brushes.Blue);
}
}
}

Thank you

[NinjaTrader_BrandonH]

Hello techsigma,

Thanks for your post.

When testing any code, it is good practice to keep an eye on the Log tab of the Control Center for any errors that occur. After testing the code you shared I see the following error occurring in the Log tab of the Control Center.

Indicator 'TestPivot3': Error on calling 'OnBarUpdate' method on bar -1: You are accessing an index with a value that is invalid since it is out-of-range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.

A CurrentBars check should be used in your indicator's logic to ensure that a certain number of bars have processed for all data series being used by the script before it begins calculation. A CurrentBars check would look something like this.

if (CurrentBars[0] < 10 || CurrentBars[1] < 10)
    return;

This would check to make sure that 10 bars have processed for the primary data series and added secondary series before the indicator begins it's calculations.

See the help guide documentation below for more information.
CurrentBar - https://ninjatrader.com/support/help...currentbar.htm
CurrentBars - https://ninjatrader.com/support/help...urrentbars.htm
Make sure you have enough bars - https://ninjatrader.com/support/help...nough_bars.htm

Let us know if we may assist further.

[techsigma]

Thanks...I see the error.