Indicator in Strategy stops plotting?

I have an additional data series in my strategy and a indicator attached to it. However, it seems to stop plotting on the visual chart, but the values behind the scenes still seem to be available. Any ideas what causes this?

	protected override void OnStateChange()
	{
		if (State == State.SetDefaults)
		{
			Description									= @"Enter the description for your new custom Strategy here.";
			Name										= "IndTest";
			Calculate									= Calculate.OnEachTick;
			EntriesPerDirection							= 1;
			EntryHandling								= EntryHandling.AllEntries;
			IsExitOnSessionCloseStrategy				= true;
			ExitOnSessionCloseSeconds					= 30;
			IsFillLimitOnTouch							= false;
			MaximumBarsLookBack							= MaximumBarsLookBack.TwoHundredFiftySix;
			OrderFillResolution							= OrderFillResolution.Standard;
			Slippage									= 0;
			StartBehavior								= StartBehavior.WaitUntilFlat;
			TimeInForce									= TimeInForce.Gtc;
			TraceOrders									= false;
			RealtimeErrorHandling						= RealtimeErrorHandling.StopCancelClose;
			StopTargetHandling							= StopTargetHandling.PerEntryExecution;
			BarsRequiredToTrade							= 20;
			// Disable this property for performance gains in Strategy Analyzer optimizations
			// See the Help Guide for additional information
			IsInstantiatedOnEachOptimizationIteration	= true;
		}
		else if (State == State.Configure)
		{
			AddDataSeries(Data.BarsPeriodType.Tick, 150);
        }
		else if (State == State.DataLoaded)
		{
			devilsEdge = TDUDevilsEdge(BarsArray[1], 12, 26, 5, 1, 10, 50, 15, 15, 20, 20);
            AddChartIndicator(devilsEdge);
		}
	}