Indicator not working...

[baba123]

I have the following error message and I do not understand why :

Object reference not set to an instance of an object
May someone give me any clues at least to understand what I did wrong ?

Here is the script :

#region Variables
// Wizard generated variables
private int period = 20; // Default setting for Period
private int rcoeff = 5; // Default setting for Rcoeff
private double rerror = 0.7; // Default setting for Rerror
private int span = 3; // Default setting for Span
// User defined variables (add any user defined variables below)
private DataSeries Cvalue;
private DataSeries Hvalue;
private DataSeries Lvalue;
private double Range = 0.0;
private double Delta = 0.0;
private bool Firstcalc = true;
private int j = 1;
private int i = 0;
private int k = 0;
private int[] Var1;
private int[] Var3;
private int[] Var4;
private double[,] Var2;
private double HlevelBreak = 0.0;
private double LlevelBreak = 0.0;
#endregion

/// <summary>
/// This method is used to configure the indicator and is called once before any bar data is loaded.
/// </summary>
protected override void Initialize()
{

CalculateOnBarClose = true;
Overlay = true;
Cvalue = new DataSeries (this);
Lvalue = new DataSeries (this);
Hvalue = new DataSeries (this);
int[] Var1 = new int[500];
double[,] Var2 = new double[500,3];
int[] Var3 = new int[500];
int[] Var4 = new int[500];
}

/// <summary>
/// Called on each bar update event (incoming tick)
/// </summary>
protected override void OnBarUpdate()
{

if (CurrentBar < period)
return;

Cvalue.Set(SMA(Close,period)[0]);
Hvalue.Set(SMA(High,period)[0]);
Lvalue.Set(SMA(Low,period)[0]);
Range = Hvalue[0]-Lvalue[0];
Delta = Range*0.3*rcoeff;

if (Firstcalc == false)
{
if (CrossAbove(High,Cvalue,1) || CrossBelow(Low,Cvalue,1) || (High[0]>=Cvalue[0] && Low[0]<=Cvalue[0]))
{
Var1[j]=Count;
Var2[j,0]=Hvalue[0];
Var2[j,1]=Cvalue[0];
Var2[j,2]=Lvalue[0];
}
}

Firstcalc=false;

HlevelBreak = Var2[j,1]+Delta;
LlevelBreak = Var2[j,1]-Delta;

if (CrossAbove(Close,HlevelBreak,1) || CrossBelow(Close,LlevelBreak,1))
{
for (int i=0; i<j ;i++)
{
if (Math.Abs(Var2[j,1]-Var2[i,1]) <= rerror*Range)
{
Var1[i]=0;
Var2[i,0]=0.0;
Var2[i,1]=0.0;
Var2[i,2]=0.0;
Var3[i]=-9;
Var4[i]=0;
}
}
j++;
}

for (int i = 0 ; i<(j+1) ; i++)
{
if ((Count-Var1[i]>10) && (CrossAbove(Cvalue,Hvalue,1) || CrossBelow (Cvalue,Lvalue,1)))
{
Var4[i]=Var4[i]+1;
if (Var4[i] >= span)
{
Var1[i]=0;
Var2[i,0]=0.0;
Var2[i,1]=0.0;
Var2[i,2]=0.0;
Var3[i]=-9;
Var4[i]=0;
}
}
}

for (int i= 0; i<(j+1); i++)
{
if (Var3[i]== -9)
{
for (int k = i ; k < (j+2) ; k++)
{
Var1[k]=Var1[k+1];
Var2[k,0]=Var2[k+1,0];
Var2[k,1]=Var2[k+1,1];
Var2[k,2]=Var2[k+1,2];
Var3[k]=Var3[k+1];
Var4[k]=Var4[k+1];
}
if (j >=1) { j--;}
}
}

for (int i= 0; i<(j+1); i++)
{
if (Var2[i,1]>0)
{
DrawDot("pivot"+i,false,0,Var2[i,1],Color.Yellow);
}
}

[NinjaTrader_Bertrand]

baba123, likely issues with accessing an array value not present - you would need to debug your code to check where this occurs -

http://www.ninjatrader-support2.com/vb/showthread.php?t=3418

http://www.ninjatrader-support2.com/vb/showthread.php?t=9825

[baba123]

After reviewing my code I wonder if the use of ArrayList method would be better ?
Basically, I would like to use some kind of multidimentional dynamic Array which could contain several type of datas (int & double).

[NinjaTrader_Bertrand]

Good idea, an ArrayList would be dynamic in size and thus perhaps easier to code with than a static sized Array.

[baba123]

Is it possible to create a multidimensional ArrayList ?
How do you declare that in the variable & initialize fields?

[NinjaTrader_Bertrand]

Unfortunately this is not supported by us as it's more general C# related, however there has been a number of threads already on this on the forums which should help you get going - http://www.ninjatrader-support2.com/...ad.php?t=24801