Custom Indicator Not Using Price Data (NT8)

[JVP3122]

I have created a custom indicator to calculate DI+ and DI- using an EMA instead of a SMA and when I apply the indicator to my chart nothing shows up and where it would otherwise say "DMExp(ES 06-16 (15 Minute), 14)", for example, the screen just shows "DMExp(14)". I am attaching a screenshot of the chart as well as pasting the code below. Can someone please tell me what I'm doing wrong?

#region Using declarations
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;
using System.Xml.Serialization;
using NinjaTrader.Cbi;
using NinjaTrader.Gui;
using NinjaTrader.Gui.Chart;
using NinjaTrader.Gui.SuperDom;
using NinjaTrader.Data;
using NinjaTrader.NinjaScript;
using NinjaTrader.Core.FloatingPoint;
using NinjaTrader.NinjaScript.DrawingTools;
#endregion

//This namespace holds Indicators in this folder and is required. Do not change it. 
namespace NinjaTrader.NinjaScript.Indicators
{
	public class DMExp : Indicator
	{
		private Series<double> dmPlus;
		private Series<double> dmMinus;
		private Series<double> tr;
		private Series<double> avgTR;

		protected override void OnStateChange()
		{
			if (State == State.SetDefaults)
			{
				Description							= @"Enter the description for your new custom Indicator here.";
				Name								= "DMExp";
				Calculate							= Calculate.OnBarClose;
				IsOverlay							= false;
				DisplayInDataBox					= true;
				DrawOnPricePanel					= true;
				DrawHorizontalGridLines				= true;
				DrawVerticalGridLines				= true;
				PaintPriceMarkers					= true;
				ScaleJustification					= NinjaTrader.Gui.Chart.ScaleJustification.Right;
				IsSuspendedWhileInactive			= true;
				Period					= 14;
				AddPlot(Brushes.Green, "DIPlus");
				AddPlot(Brushes.Red, "DIMinus");
			}
			else if (State == State.Configure)
			{
				dmPlus 		= new Series<double>(this);
				dmMinus 	= new Series<double>(this);
				tr 			= new Series<double>(this);
				avgTR		= new Series<double>(this);

			}
		}

		protected override void OnBarUpdate()
		{
			double trueRange = Math.Max(Math.Max(High[0] - Low[0], High[0] - Close[1]), Close[1] - Low[0]);
			if (CurrentBar == 0)
			{
				tr[0] 			= 0;
				dmPlus[0] 		= 0;
				dmMinus[0] 		= 0;
				DIPlus[0]		= 0;
				DIMinus[0]		= 0;
				avgTR[0]		= 0;
			}
			else
			{
				tr[0]			= trueRange;
				dmPlus[0]		= High[0] - High[1] > Low[1] - Low[0] ? Math.Max(High[0] - High[1], 0) : 0;
				dmMinus[0]		= Low[1] - Low[0] > High[0] - High[1] ? Math.Max(Low[1] - Low[0], 0) : 0;
				
				if (CurrentBar < Period)
				{
					DIPlus[0]	= DIPlus[1] + dmPlus[0];
					DIMinus[0]	= DIMinus[1] + dmMinus[0];
					avgTR[0]	= 0.5 * (avgTR[1] + tr[0]);
				}
				else
				{
					avgTR[0]	= (double) EMA(tr,Period)[0];
					DIPlus[0]	= 100 * (double) EMA(dmPlus,Period)[0] / avgTR[0];
					DIMinus[0]	= 100 * (double) EMA(dmMinus,Period)[0] / avgTR[0];
				}
			}
		}

		#region Properties
		[Range(1, int.MaxValue)]
		[NinjaScriptProperty]
		[Display(Name="Period", Order=1, GroupName="Parameters")]
		public int Period
		{ get; set; }

		[Browsable(false)]
		[XmlIgnore]
		public Series<double> DIPlus
		{
			get { return Values[0]; }
		}

		[Browsable(false)]
		[XmlIgnore]
		public Series<double> DIMinus
		{
			get { return Values[1]; }
		}
		#endregion

	}
}

#region NinjaScript generated code. Neither change nor remove.

namespace NinjaTrader.NinjaScript.Indicators
{
	public partial class Indicator : NinjaTrader.Gui.NinjaScript.IndicatorRenderBase
	{
		private DMExp[] cacheDMExp;
		public DMExp DMExp(int period)
		{
			return DMExp(Input, period);
		}

		public DMExp DMExp(ISeries<double> input, int period)
		{
			if (cacheDMExp != null)
				for (int idx = 0; idx < cacheDMExp.Length; idx++)
					if (cacheDMExp[idx] != null && cacheDMExp[idx].Period == period && cacheDMExp[idx].EqualsInput(input))
						return cacheDMExp[idx];
			return CacheIndicator<DMExp>(new DMExp(){ Period = period }, input, ref cacheDMExp);
		}
	}
}

namespace NinjaTrader.NinjaScript.MarketAnalyzerColumns
{
	public partial class MarketAnalyzerColumn : MarketAnalyzerColumnBase
	{
		public Indicators.DMExp DMExp(int period)
		{
			return indicator.DMExp(Input, period);
		}

		public Indicators.DMExp DMExp(ISeries<double> input , int period)
		{
			return indicator.DMExp(input, period);
		}
	}
}

namespace NinjaTrader.NinjaScript.Strategies
{
	public partial class Strategy : NinjaTrader.Gui.NinjaScript.StrategyRenderBase
	{
		public Indicators.DMExp DMExp(int period)
		{
			return indicator.DMExp(Input, period);
		}

		public Indicators.DMExp DMExp(ISeries<double> input , int period)
		{
			return indicator.DMExp(input, period);
		}
	}
}

#endregion

[JVP3122]

Never mind, I figured it out. The first calculation of trueRange should have happened inside the else statement.