Set general parameter defaults in code

[dbooksta]

For non-custom strategy properties/parameters how can we set the default value in code?

E.g., when I copy a strategy to a new editor I also want my defaults for things like "Data Series Value" and "Min bars required" to come along with it, just as the defaults I assign to custom parameters are defined in the code.

[NinjaTrader_ChelseaB]

Hi dbooksta,

For items that are not public properties, these need to be set in Initialize().

For example:

protected override void Initialize() 
{ 
    BarsRequired = 20;
}

In general, if you look up the special variable in the help guide, the placement of the variable will be in the example.

Below is a link to the help guide on BarsRequired.
http://www.ninjatrader.com/support/h...srequired2.htm

Also, take a look at Calculate on bar close.
http://www.ninjatrader.com/support/h...onbarclose.htm

[dbooksta]

Thanks.

I can't find all the properties in that help section. For example, how do I set the Data series Value and Type?

[NinjaTrader_ChelseaB]

Hello dbooksta,

Here is a link to the alphabetical reference of methods, special variables, and collections so that you may look up items alphabetically instead of using the search feature of the help guide.
http://www.ninjatrader.com/support/h..._reference.htm

For Value(s[0]) you can set this in OnBarUpdate, OnPositionUpdate, OnMarketData, OnMarketDepth, and OnExecution.

Value is set with:

Value.Set(11.11);

Below is a link to Value.
http://www.ninjatrader.com/support/h.../nt7/value.htm

[dbooksta]

That doesn't look like what I'm referring to. For example, I want to set the default Data series -- i.e., the bars passed to OnBarUpdate() -- to be 5 minute bars. How can I do that?

[NinjaTrader_ChelseaB]

Hi dbooksta,

The primary data series (bar type and interval) will be the dataseries of the chart (or if you are adding a strategy to the Strategies tab of the Control Center, the dataseries will be the dataseries chosen in the strategy's parameters).

You are able to add additional dataseries using the Add() method.

For example:

Add("ES 06-14", PeriodType.Minute, 5);

Below is a link to the help guide on Add().
http://www.ninjatrader.com/support/h...s/nt7/add3.htm

(edit)

Further you should look into BarsInProgress and BarsArray to see how to find which dataseries is processing and how to call an indicator using a secondary series.

http://www.ninjatrader.com/support/h...inprogress.htm

http://www.ninjatrader.com/support/h.../barsarray.htm

[dbooksta]

The primary data series (bar type and interval) will be the dataseries of the chart (or if you are adding a strategy to the Strategies tab of the Control Center, the dataseries will be the dataseries chosen in the strategy's parameters).

My objective is to have the Strategy code tell the Control Center what default bar type and interval to use, so that when I copy or paste Strategy code I (or collaborators) don't have to remember to manually set those values in the Control Center. Based on what you've said it sounds like this is not presently possible?

[NinjaTrader_ChelseaB]

Hi dbooksta,

It is not possible with NinjaTrader to change the primary data series in any way from a script.

This is by design.

Please let me know if I may be of further assistance.