Error... index with a value that is invalid since it is out of range.

[benjamin$]

Hello.

I am confused as to why my code is giving me this error. I have a working indicator that marks doji with a white dot on bar close. I am now trying to draw an extended line between two marked doji. I am using a list to collect the x-axis value via datetime and a list to collect the y-axis value as a double via the close price of the current bar (if, and only if, it's a doji). Everything works perfectly without error EXCEPT for the Draw.ExtendedLine portion.

• When this is active and I try to run it I get an error saying "Error on calling "OnBarUpdate" method on bar 27: You are accessing an index with a value that is invalid since it is out of range."
• I have a line at the beginning of OnBarUpdate that says " if (CurrentBars[0] < 20) { return; }" and if I increase this number it increases the number of the bar that throws the error.

How can I solve this issue? It seems the forum is full of this exact question but I couldn't find a clear answer.

Here is the code for this portion:

if (dBull == dBear)
{

DOJINUETRAL[0] = Convert.ToDouble(Close[0]);

List<DateTime> xValue = new List<DateTime>();

xValue.Add(Time[0]);

List<double> yValue = new List<double>();

yValue.Add(Close[0]);

//Draw Doji Lines

if (dojiLineIsActive == true)

{

Draw.ExtendedLine(this, "Doji Line", true, xValue[2], yValue[2], xValue[1], yValue[1], Brushes.LimeGreen, DashStyleHelper.Dot, 2);

}

}

[bltdavid]

I am confused as to why my code is giving me this error.

Here is the code for this portion:

if (dBull == dBear)
{

DOJINUETRAL[0] = Convert.ToDouble(Close[0]);

List<DateTime> xValue = new List<DateTime>();

xValue.Add(Time[0]);

List<double> yValue = new List<double>();

yValue.Add(Close[0]);

//Draw Doji Lines

if (dojiLineIsActive == true)

{

Draw.ExtendedLine(this, "Doji Line", true, xValue[2], yValue[2], xValue[1], yValue[1], Brushes.LimeGreen, DashStyleHelper.Dot, 2);

}

}

Your lists xValue and yValue don't have elements at those index positions.

How can they?
They're re-created via new each time dBull == dBear is true.

[benjamin$]

Your lists xValue and yValue don't have elements at those index positions.

How can they?
They're re-created via new each time dBull == dBear is true.

I only moved them there for this post so I didn't have to post my whole code. But it throws the same error even when the lists are generated prior to OnStateChange().

Is there a specific location for generating lists within Ninjascript?

[bltdavid]

Probably same reason for the error -- no elements at those index positions.

If you want any further help, I suggest you post/attach the exact code, with
no cosmetic re-arrangements -- such changes are not helpful to debugging
your problem -- all they do is exasperate the detectives who piece together
the crime scene.

[The novice police detective knows there was a stabbing, so they helpfully
pull out all the kitchen knives from all the drawers, sorted longest to shortest,
so they can be easily examined on the counter by more senior detectives
upon their arrival. Do you think that novice detective made the crime
scene any easier to understand? Just like a detective, you need to
freeze everything in time, so that others can recreate the exact
picture to discover what happened -- when you change code like
what you did you're not really solving the original problem -- so
don't do that, you misrepresented your actual issue -- that is not
a good thing to do.]

You can allocate lists anywhere you need them, it just depends on
your logic and what you're trying to accomplish.