Accessing BarsArray[0] information.

[xTrader1]

Hi ,

I need the following information to be available at Initialize for a strategy:

• Primary instrument name
• Its PeriodType (e.g. tick , range , renko)
• Its period / brick size

For getting this information on indicator , I used the following code:

if ( ChartControl != null) !!! do not use in strategy !!! {
sPr = ChartControl.BarsArray[0].ToString() ;
// Parse sPr to get the information.
// Use the information.
...................
}

It does not work for a strategy, as ChartControl is NULL.

Also I'm aware that the code above is awfully brute force and probably there are better methods to get this information.

Please help.

[NinjaTrader_Bertrand]

xTrader1, you can work with the Instrument class and BarsPeriod / Id for this -

http://ninjatrader.com/support/helpGuides/nt7/instrument.htm

http://ninjatrader.com/support/helpGuides/nt7/barsperiod.htm

[xTrader1]

Instrument name / period type / period.

Essentially, my question is the same as Mike Winfrey's question here :

http://www.ninjatrader-support2.com/vb/showthread.php?t=26826&highlight=PeriodType

The help information states it is not possible to access this information during Initialize().
Exactly as Mike I want to know properties of my primary instrument and to add more instruments base on this infor,ation , for example if the primary instrument is Range/30 , I want to add Range/60 and if it is Renko/40 , I want to add Renko/80 .

As I said above , I found a weird way to do it for an NT7 indicator , I cannot find neither a normal , nor a weird way to do it in a strategy. It's a pity , as my strategy is based on adding instruments dynamically, otherwise I should hard code X strategies , everyone for a different combination of PeriodType/Period of a primary instrument.

Please help again.

[NinjaTrader_Bertrand]

xTrader, unfortunately adding those dynamically is not supported still. However I think you could setup string inputs and just use a default then entered so it's not empty...

[xTrader1]

I found it.

xTrader, unfortunately adding those dynamically is not supported still.

As for now I found PeriodType/Period information . It is simple :

sPr = this.BarsPeriods[0].ToString() ;
Print(sPr) ;

Prints : 40 Renko

I'll share my code if/when I'll find how to access primary instrument name in Initialize() .

[kdoren]

I don't know if this will help you, but here a couple of things which have worked for me:

// The following code works inside of Initialize() in strategies:

if ((Instruments != null) && (Instruments[0] != null))
	{	
		// BarsPeriod.Value can be referenced here
		// BarsPeriod.Id can be referenced here		
		// Instruments[0].FullName can be referenced here
		
		// You can add Bars objects here	
		Add(PeriodType.Minute, IntradayPeriod);      		
		Add(Symbol, PeriodType.Minute, IntradayPeriod); 
	}

For Indicators, I use the following code in the property Symbol2 which is callable from Initialize():

// in Initialize() for an indicator:

// BarsPeriod.ID and BarsPeriod.Value can be referenced in Initialize()
Add(Symbol2, BarsPeriod.Id, BarsPeriod.Value);

//in the Properties region
public string Symbol2
{
      get 
      { 
	   if ((symbol2 == "") && (ChartControl != null) && (Instruments != null)) 
	   for(int i=0; i<ChartControl.BarsArray.Length; i++)
		if (ChartControl.BarsArray[i].Instrument.FullName != Instruments[0].FullName)
		{
			symbol2 = ChartControl.BarsArray[i].Instrument.FullName;
			break;
		}
		return symbol2; 
	}
      set { symbol2 = value.ToUpper(); }
	}

[xTrader1]

Thank you ,

Regarding indicators , now I remind I learned it from you.

Regarding strategies , it helps either , as I don't need to know instrument name to use Add(...) on default instrument.