Cannot apply indexing with [] to an expression of type 'double'

[ScorpioTravis]

Hello, can someone advise how to resolve the error message:

Cannot apply indexing with [] to an expression of type 'method group'

for this code on line 5.? (The line numbers are for reference only and are not part of the actual code.)

1. double PctChangeOL = (Open[0]-Low[0])/Open[0];
2. oHCount = 0;
3. for(int i = period; i > 0; i--)
4. {
5. if(PctChangeOL[i] > .01)
6. oHCount++;
7. }

[bltdavid]

Hello, can someone advise how to resolve the error message:

Cannot apply indexing with [] to an expression of type 'method group'

for this code on line 5.? (The line numbers are for reference only and are not part of the actual code.)

1. double PctChangeOL = (Open[0]-Low[0])/Open[0];
2. oHCount = 0;
3. for(int i = period; i > 0; i--)
4. {
5. if(PctChangeOL[i] > .01)
6. oHCount++;
7. }

Why are you appending the index "[i]" to PctChange?
PctChange is a double, it is not an Array, or a DataSeries.

The code sample you've shown is extremely nonsensical,
and strikes me as incorrect, even after "[i]" is removed.

Perhaps you first should explain what you're trying to do?

[bltdavid]

Ah, perhaps you mean something like this,

int oHCount = 0;
for (int i = 0; i < period; i++)
{
    double PctChangeOL = (Open[i]-Low[i])/Open[i];
    if (PctChangeOL > .01)
        oHCount++;
}

Note how the for loop starts at '0' and counts up,
which means it automatically handles the most recently
closed bar.

[ScorpioTravis]

David, thanks for your reply.

I'm neither a programmer nor an NT script coder. I modified another counting indicator.

The code works without the error if I use: PctChangeOL.Set((Open[0]-Low[0])/Open[0]);

instead of: double PctChangeOL = (Open[0]-Low[0])/Open[0];

But I don't want it to plot, I'm sending the values to the Output window.

[NinjaTrader_Jim]

Hello ScorpioTravis,

Thanks for your post.

It looks like in your snippet you have created PctChangeOL as a double but it also sounds like you have defined it as a DataSeries elsewhere in the script. DataSeries are used to hold values for a plot, so it sounds like that is how PctChangeOL is used.

You can use Ctrl + F to search the script for instances of PctChangeOL to see how it is created. If you just want to have a double and print it to the output window, you could change the variable to use a different name, so you are using something like "PctChangeDouble" instead of "PctChangeOL."

We look forward to assisting.