Pass a property string to Add fuction

[raffu]

Strange, if I add

Add(myInstrString, PeriodType.Range, 4);

to initialize method, after that it does not give possibilty to enter myInstrString at optimizer.. ? or actually does not show any properties at all to this strategy
without Add ok or if I add Add directy with
Add("ES ...", PeriodType.Range, 4);


region Variables:
private string myInstrString = @"ES"; // Default setting for MyInstrString

and properties:

[Description("test")]
[GridCategory("Parameters")]
public string MyInstrString
{
get { return myInstrString; }
set { myInstrString = value; }
}

[raffu]

The whole program as an example:

namespace NinjaTrader.Strategy
{
/// <summary>
/// StringTest
/// </summary>
[Description("StringTest")]
public class MyCustomStrategy : Strategy
{
#region Variables
// Wizard generated variables
private string myInstrString = @"ES"; // Default setting for MyInstrString
// User defined variables (add any user defined variables below)
#endregion

/// <summary>
/// This method is used to configure the strategy and is called once before any strategy method is called.
/// </summary>
protected override void Initialize()
{
Add(myInstrString, PeriodType.Minute, 1); // this will remove possibility to enter string value at optimizer
CalculateOnBarClose = true;
}

/// <summary>
/// Called on each bar update event (incoming tick)
/// </summary>
protected override void OnBarUpdate()
{
PrintWithTimeStamp(myInstrString);
}

#region Properties
[Description("test")]
[GridCategory("Parameters")]
public string MyInstrString
{
get { return myInstrString; }
set { myInstrString = value; }
}
#endregion
}
}

[NinjaTrader_Bertrand]

Have you tried referring to your capitalized public property in the Add(....) call?

[raffu]

Yes, tried it as well, no difference!?

Could you check it as it does not take more than one minute to build from scratch.

-

[NinjaTrader_Bertrand]

Raffu, sure - please see the attached - seems to work well on my end on chart and Strategy Analyzer.

[raffu]

and if I change
Add(myInstrString, PeriodType.Minute, 1);
to
Add("ES ..", PeriodType.Minute, 1);

is it ok as it should...

[raffu]

Raffu, sure - please see the attached - seems to work well on my end on chart and Strategy Analyzer.

Now I'm totally confused. This worked well even I cleaned it up to same level as mine.
BUT can't get mine to work, not even with different name or anything and can't see the difference at all.


included.

[raffu]

But now I got IT!

I had only the first part of instrument name there as a default, and thought that I could change it via optimizer but if it is not valid I don't get even so far..

[NinjaTrader_Bertrand]

Glad to hear and good spot, correct yours pointed to ES which is not a valid symbol name.

[Ricam]

Is there a way to test a string to see if it corresponds to a valid instrument name?
If I passed a string that is not a valid instrument name to the Add() method, is there a trappable error that will show that there is something wrong with the new BarsArray object, or a way to check that it has not been created at all?
If I am able to trap the error, can I programatically call the Add method again, with a default "known good" instrument name such as the chart master instrument Instrument.FullName?

[NinjaTrader_RyanM1]

Hi Ricam,
This is not currently possible but you have some nice ideas that would provide increased flexibility for this style of scripts. Thanks for the feedback, will forward your comments to our product development team. This request for dynamic series adding is assigned tracking id # 179.

[Ricam]

I think it can be done by iterating through the instrument list and looking for a match. However there is a minor bug in my code that is preventing the iteration from working.

See posts 3 and 4 in this thread.

http://www.ninjatrader.com/support/forum/showthread.php?t=37579&highlight=upshon