Arraylist in Ninjatrader

July 16th, 2012, 01:05 PM

Dear all,

I've got the following problem. I have a strategy which I can test on a basket of stocks, now I want to have one equity curve therefore I want to add multiple symbols into one strategy.

I've added the symbols (SPY, DIA, SLV)and then want to work with a loop.

Code

                            
for (int x = 0;   x < 3 ; x++) { 

if (Closes[x][0] > Closes[x][0] 

) { variablex = Closes[x][0] }

When using this, the different symbols will overwrite variablex. So I want to create for each symbol their own variablex.

I understand that this can be done with Arraylist.

So I add this in Variables region.
private ArrayList myArray = new ArrayList();

But how to progress further? Something like this instead of variablex?:
myArray.Add((double)(Closes[x][0]));
But then they will still write eachother over.. right?

Thanks in advance!

July 16th, 2012, 03:49 PM

no111

Dear all,

I've got the following problem. I have a strategy which I can test on a basket of stocks, now I want to have one equity curve therefore I want to add multiple symbols into one strategy.

I've added the symbols (SPY, DIA, SLV)and then want to work with a loop.

Code

                            
for (int x = 0;   x < 3 ; x++) { 
if (Closes[x][0] > Closes[x][0] 
) { variablex = Closes[x][0] }

When using this, the different symbols will overwrite variablex. So I want to create for each symbol their own variablex.

I understand that this can be done with Arraylist.

So I add this in Variables region.
private ArrayList myArray = new ArrayList();

But how to progress further? Something like this instead of variablex?:
myArray.Add((double)(Closes[x][0]));
But then they will still write eachother over.. right?

Thanks in advance!

If I understand correctly, you will only have a limited know number of values for x. In that case a fixed array is more appropriate then an array list of variable dimension.

Code

private double[]  variablex = new double [3];

should do the trick. You can then use it as

Code

variablex[0] = Closes[0][0];
variablex[1] = Closes[1][0];

etc.

Arraylist in Ninjatrader

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Arraylist in Ninjatrader