confused about data series

[JimPunkrockford]

i want to calculate on bar close a value that is = value one bar ago minus some other valuse


Value2 = (Value2[1] - Value1);

i can't seem to get this to work, is the DataSeries the right way to set this up?

[NinjaTrader_PatrickH]

Hello JimPunkrockford,

Thank you for your post.

Yes, a DataSeries would be correct. Please try the following:

Value2.Set(Value2[1] - Value1);

[JimPunkrockford]

okay. so first i need to set up a variable that is Value2 in the variables region.

i did this

DataSeries Value2;

then nothing in void Initalize()

then your suggestion in on bar update.

that compiles but causes me to not be able to plot Value1 anymore

[NinjaTrader_PatrickH]

Hello JimPunkrockford,

Thank you for your response.

Please provide the full code so I may investigate this matter further. You will find the .cs file for the indicator in the following directory on your PC: (My) Documents\NinjaTrader 7\bin\Custom\Indicator.

[JimPunkrockford]

#endregion

// This namespace holds all indicators and is required. Do not change it.
namespace NinjaTrader.Indicator
{
/// <summary>
/// third try at trin osc
/// </summary>
[Description("third try at trin osc")]
public class myindicator3utillstep4 : Indicator
{
#region Variables
// Wizard generated variables
private string data2 = @"^TRIN"; // Default setting for Data2
private string data3 = @"^DJIA"; // Default setting for Data3

// User defined variables (add any user defined variables below)
int Length = 5;
DataSeries Value4;
DataSeries Value6;
DataSeries Value9;
DataSeries Value10;
#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.Orange), PlotStyle.Line, "Plot1"));

Overlay = false;
Add(Data2,PeriodType.Day,1);
Add(Data3,PeriodType.Day,1);


}

/// <summary>
/// Called on each bar update event (incoming tick)
/// </summary>
protected override void OnBarUpdate()
{
try
{

double Value3 = (-(Closes[1][0])+(Closes[2][0]));
Value4.Set(Value4[1]-Value3);

Plot1.Set(Closes[1][0]);


}
catch (Exception ex)
{
Print (ex.ToString());
}
}

[JimPunkrockford]

as soon as i add the line about Value4.set, my plot no longer works

[NinjaTrader_PatrickH]

Hello JimPunkrockford,

Thank you for your response.

You will need to sync the DataSeries in the Initialize() method as well:

protected override void Initialize()
{
Value4 = new DataSeries(this);

[JimPunkrockford]

i thought i might have to do that.

thanks that worked.

i still don't get what the holder "this" is supposed to be.

[koganam]

i thought i might have to do that.

thanks that worked.

i still don't get what the holder "this" is supposed to be.

"this" specifies the current class file that is being used. It is a keyword that allows you to specify the class without having to write its actual name.