Printing only the last value

[MAX]

Hi.

On the chart I want to count the times when the close is greater than the open and then print only the final result on the output window.

Below is my code:
if (Close[0] > Open[0])
{
CountEvent = CountEvent + 1;
}
Print(CountEvent);

This way on the output window I have each string for any event that is true, but I only need the print of the last value. How can I do?

Thanks for any answer.

[NinjaTrader_JoshP]

if (Close[0] > Open[0])
{            
     CountEvent = CountEvent + 1;                
}    
if (!Historical)
     Print(CountEvent);

if (!Historical) checks to see if the bar is a historical bar or a real time bar. If it is a historical bar it will ignore the print command. If it is a real time bar then it will do the print.

http://www.ninjatrader-support.com/HelpGuideV6/Historical.html

[MAX]

Is there any command to do the same in both realtime and historical?

[NinjaTrader_Ray]

When you say "Final" that implies that there is no more real-time data coming in and thus the chart has a finite number of bars. So in real-time, your "final" number is growing by 1 on each new bar where your condition is met.

[KBJ]

There are a couple of problems with checking for "!Historical". First, it won't work if you limit the time range to only backtest data (e.g., June 1 to June 30), and also it won't work if you're not currently connected to a datafeed.

Try this instead:

if (CurrentBar == Count) then Print CountEvent;

Well I thought that would print the last bar's total... but it didn't.

I added the following statement to try to debug this:

Print(String.Format( "CurrentBar={0}/Count={1}: CountEvent={2} Historical={3}", CurrentBar, Count, CountEvent, Historical ));

however, the display I get stops one bar shy of the total (Count). For example...

CurrentBar=0/Count=2281: CountEvent=1 Historical=True
CurrentBar=1/Count=2281: CountEvent=1 Historical=True
...
CurrentBar=2278/Count=2281: CountEvent=837 Historical=True
CurrentBar=2279/Count=2281: CountEvent=838 Historical=True
<then it stops>

Its only displaying 2280 bars, yet Count is 2281. I've tried this with several different instruments and time frames, but it always stops one bar short of Count.

So, is the documentation wrong on this?

Best regards,

KBJ

[NinjaTrader_Ray]

CurrentBar is zero based where Count is 1 based. This means that:

Count == CurrentBar + 1

[KBJ]

Ray,

Thanks for looking at this.

The problem that I see is that for the last time that OnBarUpdate is called, Count == CurrentBar + 2, so it never gets to the last bar, and never gets as far as Count == CurrentBar + 1.

Please look at my example, again. This is very easy to reproduce.

Best regards,

KBJ

[NinjaTrader_JoshP]

This is the case when you have CalculateOnBarClose set to true. Because NinjaTrader will not act till it knows the bar is closed you are essentially one bar behind with CurrentBar. This behaves this way because everything you do at the end of, say bar 5, is done actually at the very beginning of bar 6. Pragmatically, this is how you would want it to behave if CalculateOnBarClose is true because you want to reference the bar that just finished. You could set CalculateOnBarClose to false if this is not how you desire your calculations to be done.

[NinjaTrader_Dierk]

CalculateOnBarClose=False: Due to NT internal, multi threaded architecture there is no guarantee that

CurrentBar == Bars.Count - 1

However, it's guaranteed that

CurrentBar <= Bars.Count - 1

Reason: OnBarUpdate is called once per tick. However, as OnBarUpdate is triggered there might be more inflight ticks which already have been added to the bars series (in a different thread).

[KBJ]

Josh & Dierk,

Thanks. Mystery solved.

I'd coded it checking for Count-1 in prior strategies, but could never figure out why it had to be that way. Now I know.

Perhaps you've done this already, but if not, may I suggest updating the descriptions of CurrentBar and Count in the help to include this valuable data?

Best regards,

KBJ

[NinjaTrader_Ray]

Thanks for the suggestion. I will ammend the documentation for NT 6.5.

[MAX]

Hello.
I coded a simple indicator to print a specified value only on the last bar of the chart. Nevertheless the trouble is that the indicator is always returning "true" on my parameter in spite of the code where "false" is indicated.
At the bottom of the code I programmed an if statement which make the choice to add 1 or 2 to the currentbar to make it of the same value of "Count".

How can it be?

protected override void Initialize()
        {
            Add(new Plot(Color.FromKnownColor(KnownColor.Orange), PlotStyle.Bar, "value1"));
			
            CalculateOnBarClose	= false;
            Overlay = false;
            PriceTypeSupported	= false;
			
        }


protected override void OnBarUpdate()
        {


if (CalculateOnBarClose = true)
			{
			BarstoAdd = 2;
			}
			else if (CalculateOnBarClose = false)
			{	
			BarstoAdd = 1;	
			}	
				
			
			if (CurrentBar + BarstoAdd == Count) 
			Print("value1" + " " + CountPatterns + " " + CurrentBar+ " " + Count);
}

[NinjaTrader_Ray]

Max,

Because you keep setting the value to true.

if (CalculateOnBarClose = true)

Should be

if (CalculateOnBarClose == true)