Calling values from Dictionary/List

November 24th, 2022, 04:54 PM

Good day and appreciate your time in reading my issue currently faced and helping me learn.

I've been attempting to learn C# and the learnings I'm coming across are not translating into NinjaTrader.

I have the below snippet of sample code that is working as expected. It creates a Dictionary with multiple values per line.

The output I get is:

1 3956 valueA valueB
2 3955.50 valueA valueB
3 3955.25 valueA valueB
4 3955.75 valueA valueB
5 3955 valueA valueB

What i'm having a hard time achieving is pulling a specific valueA or valueB from a specific index/price.

I'm also not sure if my list needs to be sorted by price...and if yes...i'm not sure how to accomplish that either.

My ask: Can someone help me code the "how to pull a specific valueA or valueB from a specific index/price. And how to properly sort my Dictionary/List if needed.

Thank you!

Code

public class Dictionary_Test : Indicator
	{
		private Series<Dictionary<double, List<double>>> listValues;
		
		protected override void OnStateChange()
		{
			if (State == State.SetDefaults)
			{
				Description = @"Enter the description for your new custom Indicator here.";
				Name = "Dictionary_Test";
				Calculate = Calculate.OnEachTick;
				IsOverlay = false;
				DisplayInDataBox = true;
				DrawOnPricePanel = true;
				DrawHorizontalGridLines = true;
				DrawVerticalGridLines = true;
				PaintPriceMarkers = true;
				ScaleJustification = NinjaTrader.Gui.Chart.ScaleJustification.Right;
				IsSuspendedWhileInactive = true;
			}
			else if (State == State.DataLoaded)
			{
				listValues = new Series<Dictionary<double, List<double>>>(this);
				
			}
		}
		
		protected override void OnBarUpdate()
		{
			double valueA 			= //some calculation ;
			double valueB 			= //some calculation ;

			if(IsFirstTickOfBar)
			{
				// only create our dictionary once per bar
				listValues[0] = new Dictionary<double, List<double>>();
			}

			if(listValues[0].ContainsKey(Close[0]))
			{
			// update valueA/valueB for price if we've already recorded something at that price
			listValues[0][Close[0]] = new List<double> { valueA, valueB };
			}
			else
			{
			// if we don't have that price as a key, add it and its valueA/valueB volume
			listValues[0].Add(Close[0], new List<double> {valueA, valueB });
			}
			
			
			int i = 1;
			foreach(var keyValue in listValues[0])
			{
				Print( i++);
				var key = keyValue.Key;
				var value = keyValue.Value;
				Print(key +" - "+value[0]+" - "+value[1]);
			}

		
		}

November 25th, 2022, 01:00 PM

A Series of dictionary? I don't think this is what you want.
If I understand correctly you should create a <double, double, double> object, and create a List for it.

A Dictionary doesn't allow duplicate keys.

November 25th, 2022, 02:33 PM

Appreciate the response. The results of the provided code do not create duplicate keys.

Again, the output i get is:

1 3956 valueA valueB
2 3955.50 valueA valueB
3 3955.25 valueA valueB
4 3955.75 valueA valueB
5 3955 valueA valueB

My ask: Can someone help me code the "how to pull a specific valueA or valueB from a specific index/price. And how to properly sort my Dictionary/List if needed.

November 26th, 2022, 04:21 AM

DirtyGoats

Appreciate the response. The results of the provided code do not create duplicate keys.

Again, the output i get is:

1 3956 valueA valueB
2 3955.50 valueA valueB
3 3955.25 valueA valueB
4 3955.75 valueA valueB
5 3955 valueA valueB

My ask: Can someone help me code the "how to pull a specific valueA or valueB from a specific index/price. And how to properly sort my Dictionary/List if needed.

Very quick & dirty:

Code

                            
namespace NinjaTrader.NinjaScript.Indicators {

    public class myData    {

        public double A { get; set; }

        public double B { get; set; }

        public myData(double a, double b)

        {

            this.A = a;

            this.B = b;

        }

    }

    

 public class DictionaryTest : Indicator    {

    private Dictionary<double,myData> myDict;

        

    protected override void OnStateChange() {

       if (State == State.SetDefaults)

       {

                ...

       }

       else if (State == State.DataLoaded)       {

                myDict = new Dictionary<double, myData>();

        }

       }



       protected override void OnBarUpdate() {

          if (myDict.ContainsKey(Close[0]))

          myDict[Close[0]] = new myData(1.0, 2.0);

          else

          myDict.Add(Close[0], new myData(5.0, 6.0));

          }

    }

}

Then you can pull a specific item like this:

Code

                            
Print(myDict[3956].A+" "+myDict[3956].B);

No need to sort a dictionary.

Calling values from Dictionary/List

Discussion in NinjaTrader

Calling values from Dictionary/List