well I'm lost...

[baba123]

I created an indicator that is not working.

When I run my script I get the following error message :

Error on calling 'OnBarUpdate' method for indicator 'Pivots' on bar 3118: You are accessing an index with a value that is invalid since its out of range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.

After checking the code I finally pinpoint the issue but this is confusing and I don't understand it.

I conditionally stored some price values on a list named xx and at some point I try to get the index of the closest ones below/above the last Close. Here is the code :

var24=999999.00;
var25=999999.00;
for (int i=0 ; i<xx.Count ; i++)
{
var58 = Close[0]-xx[i].Cprice;
if (var58<0 && Math.Abs(var58)< Math.Abs(var24))
{
var24 = var58;
var28 = i;
}
if (var58>=0 && var58 < var25)
{
var25 = var58;
var29 = i;
}
}
Print(var28+" "+var29+" "+xx.Count);

As you can see my index should NEVER reach xx.Count as I specified it in the loop but when I print my var28 & var29 (that contain index values)+xx.Count.........SURPRISE!!!...I found out that at some point index equals xx.Count.

How the hell is it possible ?

[ETFVoyageur]

Your Print statement is after the loop, where I would expect i to be xx.Count. Are you saying that i is reaching xx.Count and executing the loop code that way?

--EV

[baba123]

the highest value "i" can take is xx.Count-1 but as you can see in the output file this is not the case and I do not understand why.

Anyway is there a more proper way to achieve what I want, I mean get the index of the closest values stored in my list element above/below the last Close ?

[NinjaTrader_Bertrand]

Do you have the needed CurrentBars check at the OnBarUpdate() start at all?

http://www.ninjatrader.com/support/forum/showthread.php?t=3170

[baba123]

Yes, I already checked this.

The thing I do not understand is the fact that when writing "for(int i=0; i<xx.Count; i++)"
at some point i =xx.Count as you can see in the output file.

This is what is causing error in my script....

[ETFVoyageur]

Yes, I already checked this.

The thing I do not understand is the fact that when writing "for(int i=0; i<xx.Count; i++)"
at some point i =xx.Count as you can see in the output file.

This is what is causing error in my script....

Once again, your print statement is AFTER your loop, and so i will be xx.Count when you get there. The loop will never be executed with i==xx.Count, but that does not mean i cannot assume that value. Try the following code:

            int xx;
            for (xx=0; xx<10; xx++)
                Print ("In loop x= " + xx);
            Print ("After loop x=" + xx);

It will print:

In loop x= 0
In loop x= 1
In loop x= 2
In loop x= 3
In loop x= 4
In loop x= 5
In loop x= 6
In loop x= 7
In loop x= 8
In loop x= 9
After loop x=10

-- EV

[koganam]

That is because of the way that you are incrementing your index. Try this instead:

for(int i=0; i<xx.Count; ++i

In which case, you may also have to start your count at i = -1. It just depends on what you want your processing to do.