Another Beginner's Question

[tradenj]

Hello:
I'm curious why "two" data series are required for viewing a new chart.

Also in coding, if bars of the first series are referred to as [0], [1], [2] ... [n-1], how are the bars of the second series referenced?

Thank you.

[coolmoss]

Two data series are not required. What makes you think two are required?

[NinjaTrader_JC]

Hello tradenj,

In a multiseries script, they will be referenced the same way as the normal series would be but you would add the BarsInProgress or BarsArray. You may view the following link to our Help Guide for more detailed information on how bars are referenced inside of multiseries script.

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?multi_time_frame__instruments.htm

[tradenj]

Hi:
Thanks so much for your prompt replies.

I look forward to reading about BarsInProgress and BarsArray in the supplied link.
Concerning the requirement of 2 series per chart, upon selecting
Control Center => File => New => Chart => SomeDataSeriesName => New => OK
the following Error window pops up:
"The chart template 'Default' requires '2' Data Series. Please add '1' more Data Series
to the lower left section of the Format Data Series window before applying the chart
template."

[sledge]

Hi:
Thanks so much for your prompt replies.

I look forward to reading about BarsInProgress and BarsArray in the supplied link.
Concerning the requirement of 2 series per chart, upon selecting
Control Center => File => New => Chart => SomeDataSeriesName => New => OK
the following Error window pops up:
"The chart template 'Default' requires '2' Data Series. Please add '1' more Data Series
to the lower left section of the Format Data Series window before applying the chart
template."

You must have added a template as the default for a series with 2 data series. *GULP*.

Do you have any other templates you can choose for a single series?

Choose that, load that chart up, and then set that as the default template....

[tradenj]

OK, 2-Data-Series requirement problem solved!

-Much appreciate these supportive bits of information which ease the struggles of this Ninja newbie.

[tradenj]

BarsArray Referencing Problem

Hello again:
I've studied the BarsArray/ BarsInProgress documentation but am still having a problem with referencing.

Code Objective: Color background green if both primary and secondary Data Series display an up bar.

Compiler Error:: Argument 1: Cannot convert from 'double' to 'int'. (Occurs at each call to BarType; see /*ERROR*/ below)

Am I sending an address to BarType by mistake instead of the bar number? If so, how do I dereference BarsArray[x][y] to get the contents at the address? (Additional note: If its NOT OK to send an array reference as a parameter I can change program structure to comply.)

Thanks in advance for any ideas.

/*Using */
namespace NinjaTrader.Strategy
{
    public class v1d02092013 : Strategy
    {
        /* Variables */
        /** *************************************************************************** */ 
	public bool BarType (int ThisBar, string Which)
	{
		bool fnResult = false;
		switch (Which) 
		{
			case "Up": 
				if (Close[ThisBar]>Open[ThisBar]) 
					fnResult = true; 
				break;
			case "Down": 
				if (Close[ThisBar]<Open[ThisBar]) 
					fnResult = true; 
				break;
			default: 
				break;
		}
		return fnResult;
	}
	/** *************************************************************************** */ 	
	protected override void Initialize()
        {
            Add("MSFT", PeriodType.Minute, 2);
			CalculateOnBarClose = true;
        }	
        protected override void OnBarUpdate(     )
        {
	        if (CurrentBars[0] < BarsRequired || CurrentBars[1] < BarsRequired)
			return;
		if (BarType (BarsArray[0][0],"Up"))                   /*ERROR*/
			if (BarType (BarsArray[1][0],"Up"))	       /*ERROR*/
				BackColorAll = Color.PaleGreen;		
	}
       /* Properties*/    
    } /*class*/
} /*namespace*/

[NinjaTrader_Lance]

Hello,

As is you're sending the double value of the closing price to your BarType function.

Instead of over complicating your script

You could use Closes[][] and Opens[][] to see if the bars were up

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?closes.htm

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?opens.htm

if(Closes[0][0] > Opens[0][0] && Closes[1][0] > Opens[1][0])
{
  //set bar color
}

Let me know if I can be of further assistance.

[tradenj]

-Just now returning...

Hello:
-Just now returning after some days away.

Thank you for your reply -- it really gets to the crux of my problem. As a Wealth Lab programmer I'm used to viewing and referencing everything in terms of "bar number". Here in Ninja that level of reference doesn't seem to be present. -Great simplification!!

I also have the following question. Various small experimental programs (with compiler errors) have accumulated in my directory since I started at Ninja a few weeks ago. When compiling any new piece of code the system now says "Error on generating strategy" but then lists descriptions for errors in programs other than the one just compiled. I don't understand what's going on here or what to do about it. I could simply pitch all of the alternate pieces of test code but feel some hesitation about doing that.

Thanks again for the help.

[koganam]

Hello:
-Just now returning after some days away.

Thank you for your reply -- it really gets to the crux of my problem. As a Wealth Lab programmer I'm used to viewing and referencing everything in terms of "bar number". Here in Ninja that level of reference doesn't seem to be present. -Great simplification!!

I also have the following question. Various small experimental programs (with compiler errors) have accumulated in my directory since I started at Ninja a few weeks ago. When compiling any new piece of code the system now says "Error on generating strategy" but then lists descriptions for errors in programs other than the one just compiled. I don't understand what's going on here or what to do about it. I could simply pitch all of the alternate pieces of test code but feel some hesitation about doing that.

Thanks again for the help.

All your .cs files are compiled into one dll so that at runtime all code runs as native executable code. (Think: "speed of execution"). Therefore, all your .cs files must be error-free and compilable before you can compile. Correct all errors or remove the defective files.

[tradenj]

Ninja vs Wealth Lab Continued

OK, thanks for the insight.

This concerns another major difference between Ninja and Wealth Lab where all scripts are saved to a directory/ folder on the PC's hard drive. These programs, which are loaded into Wealth Lab and compiled individually by the user upon request, need not be error free. They can also be deleted upon navigation (via Start Menu "Explore") to the appropriate hard drive folder.