Failed Swing Indicator

[CelticTiger]

I am trying to create an indicator that will calculate the SMA average of a sepcified period of the High - (Minus) the open of a bar and that value multiplied by 2.8 to plot that line on the chart. Here is how far I got using the Wizard as a start, the compilation is providing a failuer message..

#region Using declarations
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Xml.Serialization;
using NinjaTrader.Cbi;
using NinjaTrader.Data;
using NinjaTrader.Gui.Chart;
#endregion

// This namespace holds all indicators and is required. Do not change it.
namespace NinjaTrader.Indicator
{
/// <summary>
/// Enter the description of your new custom indicator here
/// </summary>
[Description("Enter the description of your new custom indicator here")]
public class FailedSwing : Indicator
{
#region Variables
private int period = 4;
// Wizard generated variables
private string defaultInst = @"YM ##-## (Daily)"; // Default setting for DefaultInst
// User defined variables (add any user defined variables below)
#endregion

/// <summary>
/// This method is used to configure the indicator and is called once before any bar data is loaded.
/// </summary>
protected override void Initialize()
{
Add(new Plot(Color.FromKnownColor(KnownColor.RoyalBlue), PlotStyle.Line, "FSwing"));
Overlay = false;
}

/// <summary>
/// Called on each bar update event (incoming tick)
/// </summary>
protected override void OnBarUpdate()
{
// Use this method for calculating your indicator values. Assign a value to each
// plot below by replacing 'Close[0]' with your own formula.
Value.Set((SMA(High)[0] - SMA (Open)[0])*2.8);
}

#region Properties
[Browsable(false)] // this line prevents the data series from being displayed in the indicator properties dialog, do not remove
[XmlIgnore()] // this line ensures that the indicator can be saved/recovered as part of a chart template, do not remove
public DataSeries FSwing
{
get { return Values[0]; }
}

[Description("")]
[GridCategory("Parameters")]
public string DefaultInst
{
get { return defaultInst; }
set { defaultInst = value; }
}
#endregion
}
}

[NinjaTrader_CodyB]

Hello,
There is not a period set for the SMA. A period must be set for the SMA to calculate.
I have proved an example of the code for Value.Set() that will compile.

Value.Set((SMA(High, 20)[0] - SMA(Open, 20)[0]) * 2.8);

If we can be of any other assistance please let us know.