Bars Ago in an indicator

December 30th, 2013, 03:37 PM

patbateman

The bars ago function does NOT work when creating ninjascript for indicators. It ONLY works for creating indicators for strategies.

In other words, if you make an indicator that is simply Close[10], it will not function. It will compile, but the compiler will not read it.

So, I'm trying to figure out a way to use something like bars ago that does not involve the traditional approach.

If I can get just Close[0] - Close[20] to work, I can go from there.

Hope this helps!

The method works for all indicators, but you can only access Close[20] for bars > 20. You need to add the following line in the beginning of OnBarUpdate()

Code

if (CurrentBar < 20)
 return;

and the code should run after compiling it.

December 30th, 2013, 03:43 PM

I think this clarifies it...

Abbott: You throw the ball to first base.
Costello: Then who gets it?
Abbott: Naturally.
Costello: Naturally.
Abbott: Now you've got it.
Costello: I throw the ball to Naturally.
Abbott: You don't! You throw it to Who!
Costello: Naturally.
Abbott: Well, that's it�say it that way.
Costello: That's what I said.
Abbott: You did not.
Costello: I said I throw the ball to Naturally.
Abbott: You don't! You throw it to Who!
Costello: Naturally.

December 30th, 2013, 04:01 PM

Tasker_182

I think this clarifies it...

Abbott: You throw the ball to first base.
Costello: Then who gets it?
Abbott: Naturally.
Costello: Naturally.
Abbott: Now you've got it.
Costello: I throw the ball to Naturally.
Abbott: You don't! You throw it to Who!
Costello: Naturally.
Abbott: Well, that's it�say it that way.
Costello: That's what I said.
Abbott: You did not.
Costello: I said I throw the ball to Naturally.
Abbott: You don't! You throw it to Who!
Costello: Naturally.

I was not aware that Abbott and Costello were traders?

December 30th, 2013, 04:03 PM

Tasker_182

Maybe I'm overthinking this. Lets use your example as an example, Close[0] - Close[20]

if you create a variable to put the results in, will that not meet your needs?

IE:

double diff = Close[0] - Close[20] ;

So the above code statement declares a variable called "diff" that is a double type. Next (on the other side of equals) the difference between Close[0] and Close[20] is put into diff. The ";" ends the C# statement.

Is that what you want?

Tried this, and it didn't work.

Also tried doing them in separate Ninjascript files... no go...

I confirmed with NT help, that bars ago does not work in indicators, only strategies.

December 30th, 2013, 04:10 PM

Fat Tails

I was not aware that Abbott and Costello were traders?

I believe they traded quips, quite frequently.

December 30th, 2013, 04:11 PM

patbateman

Tried this, and it didn't work.

Also tried doing them in separate Ninjascript files... no go...

I confirmed with NT help, that bars ago does not work in indicators, only strategies.

Maybe you need to share with us the whole thing you are trying to do because there is clearly misunderstanding of your needs.

December 30th, 2013, 06:38 PM

Not sure how much more clear I can get.

There are TWO types of ninjascripts: INDICATORS and STRATEGIES.

The BARS AGO function *ONLY* works for STRATEGIES.

So I need to write

Close[0]-Close[30]

in an alternate way WITHOUT using the [30]. That is all. No need to debate if this is true or not, since confusion on that part is irrelevant, since I've confirmed the issue with NT staff.

Again,

How can I write

Close[0]-Close[10]

in a way that does not use the [10]?

December 30th, 2013, 06:53 PM

patbateman

Not sure how much more clear I can get.

There are TWO types of ninjascripts: INDICATORS and STRATEGIES.

The BARS AGO function *ONLY* works for STRATEGIES.

So I need to write

Close[0]-Close[30]

in an alternate way WITHOUT using the [30]. That is all. No need to debate if this is true or not, since confusion on that part is irrelevant, since I've confirmed the issue with NT staff.

Again,

How can I write

Close[0]-Close[10]

in a way that does not use the [10]?

int barsAgo = 10;

double diff = Close[0] - Close[barsAgo];

December 30th, 2013, 10:43 PM

Fat Tails

The method works for all indicators, but you can only access Close[20] for bars > 20. You need to add the following line in the beginning of OnBarUpdate()

Code

if (CurrentBar < 20)
 return;

and the code should run after compiling it.

patbateman

Tried this, and it didn't work.

Also tried doing them in separate Ninjascript files... no go...

I confirmed with NT help, that bars ago does not work in indicators, only strategies.

patbateman

Not sure how much more clear I can get.

There are TWO types of ninjascripts: INDICATORS and STRATEGIES.

The BARS AGO function *ONLY* works for STRATEGIES.

So I need to write

Close[0]-Close[30]

in an alternate way WITHOUT using the [30]. That is all. No need to debate if this is true or not, since confusion on that part is irrelevant, since I've confirmed the issue with NT staff.

Again,

How can I write

Close[0]-Close[10]

in a way that does not use the [10]?

Sorry, but everyone who is trying to help you writes indicators and uses the [bars ago] routinely in their indicators.

Close[0] - Close[10] works just fine in indicators; we all do this all the time. You just need to have the statement @Fat Tails mentioned to check that you have enough bars available to make the subtraction.

There may be a misunderstanding between you and NT support about what you are trying to accomplish, but, believe me, everyone who writes indicators uses the Close[bars ago] expression successfully. I do it and it works fine.

If you post the full code that is having a problem, I'm sure someone will help you fix it.

Bob.

December 31st, 2013, 06:12 AM

@patbateman: You can use barsAgo without limitations in indicators. The problem is that you do not disclose the information necessary to solve your problem. We cannot fix your bug, if you do not show us the code.

Please export the indicator with NinjaTrader and post it here. In a few minutes the bug will be identified and the discussion will be over.

Bars Ago in an indicator

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Bars Ago in an indicator