Enqueue a variable

August 29th, 2012, 07:23 PM

Does anyone know how to pass a variable unsing Enqueue??

for example:

double myprofit = 99.75;

myQ.Enqueue(myprofit);

This method does not work for some reason. I am looking for a FIFO structure I can use to store non-continuous data, and am open to other suggestions.

August 29th, 2012, 07:42 PM

Do you receive any errors?

Have you initialized your queue beforehand:

Code

                            
myQ = new Queue<double>();

August 29th, 2012, 07:48 PM

gregid

Do you receive any errors?

Have you initialized your queue beforehand:

Code

                            
myQ = new Queue<double>();

Hey @gregid I had initialized the Queue beforehand. Actually I used the dictionary method you helped me with, but a Queue dictionary. I was able to pass a value directly into the queue, but when I tried to pass a variable, it would not work.

August 29th, 2012, 08:01 PM

@Xav1029 I am afraid you will have to post a bit more of your queue/dictionary code (your declared queue, how it is initialized).

Also, are you saying you were able to do:
myQ.Enqueue(99.75);

or was your successful syntax different?

August 29th, 2012, 08:01 PM

I deleted all the code and gave it another try, and it worked this time. I don't know what I had done wrong before, but had looked over the code 20 times and could not find anything wrong. Time to get some rest now, this project is going to take a while

August 29th, 2012, 08:05 PM

Here is the code that worked:

Code

#region Variables
		double test = .9898;
		
		private Dictionary<int, DataSeries>indicatorD;		//Used to store the indicator values
		
		private Dictionary<int, DataSeries>EPLd;			//Used to store short term expected profit for long trades
		private Dictionary<int, DataSeries>EPSd;			//Used to store short term expected profit for short trades
		private Dictionary<int, DataSeries>MFE_Ld;			//
		private Dictionary<int, DataSeries>MAE_Ld;
		private Dictionary<int, DataSeries>MFE_Sd;
		private Dictionary<int, DataSeries>MAE_Sd;
		
		private Dictionary<int, Queue<double>>Qtest;
		
        #endregion


        protected override void Initialize()
        {
            Overlay				= false;
			//-------------------Eight Data Series for the indicators------------------------------
			indicatorD 			= new Dictionary<int, DataSeries>();
			
			//---------------------Twenty Four of the following-----------------------------------
			EPLd				= new Dictionary<int, DataSeries>();
			EPSd				= new Dictionary<int, DataSeries>();
			MFE_Ld 				= new Dictionary<int, DataSeries>();
			MAE_Ld 				= new Dictionary<int, DataSeries>();
			MFE_Sd 				= new Dictionary<int, DataSeries>();
			MAE_Sd 				= new Dictionary<int, DataSeries>();
			
			Qtest				= new Dictionary<int, Queue<double>>();
			
			
			
        }
		
		protected override void OnStartUp()
		{
			for(int i = 0; i < 8; i++)
			{
				indicatorD[i] = new DataSeries(this);
			}
			
			for (int i = 0; i < 24; i++)
			{
    			EPLd[i] = new DataSeries(this);
				EPSd[i] = new DataSeries(this);
				MFE_Ld[i] = new DataSeries(this);
				MAE_Ld[i] = new DataSeries(this);
				MFE_Sd[i] = new DataSeries(this);
				MAE_Sd[i] = new DataSeries(this);
			}
			
			for(int i = 0; i < 8; i++)
			{
				Qtest[i] = new Queue<double>();
			}
		}


        protected override void OnBarUpdate()
        {
			
			Qtest[0].Enqueue(test);
			//test+=1;
			Print(Qtest[0].Peek());
        }

My previous try was an int Queue, and I could not pass CurrentBar to it or an int variable. Don't know why, but a fresh start worked

August 29th, 2012, 08:11 PM

Glad fresh start worked for you - I do it all the time

August 30th, 2012, 10:29 PM

Here is an indicator that has a routine by jabeztrading that uses enqueue to plot swings.
It is very effective and shows how to set it up.

NinjaTrader Support Forum - View Single Post - Swing indicator edits

I have used the routine in several custom indicators and it works well for me.

August 31st, 2012, 06:09 AM

DavidHP

Here is an indicator that has a routine by jabeztrading that uses enqueue to plot swings.
It is very effective and shows how to set it up.

NinjaTrader Support Forum - View Single Post - Swing indicator edits

I have used the routine in several custom indicators and it works well for me.

Thanks for the response. I am still building the foundation for the tool I am working on, and for some reason Peek is not returning the same values as Dequeue. Please see attatched file and what gets printed in the output window.

EDIT: Disregard this post. I had the beginning and end of the queue mixed up in my head. I thought the beginning was the last item added, but that is actually the end due to the FIFO structure that I am trying to achieve.

Enqueue a variable

Discussion in NinjaTrader

Enqueue a variable