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Old 07-19-2018, 07:54 AM   #1
uday12
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Default BarsRequiredToPlot

Hi,

I had a question regarding BarsRequiredToPlot.

When I look at the standard SMA indicator (provided by NT8) in the NT editor, it doesn't appears to have a BarsRequiredToPlot defined.

But when I drop the standard SMA indicator on a chart with a parameter of 10, it appears to skips the first 20 bars.

I wrote a replica of the standard SMA indicator, with BarsRequiredToPlot equal to the Period and even that indicator skips the first 20 bars (for a SMA parameter of 10).

Why is this so?

See attached graph.
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Old 07-19-2018, 08:31 AM   #2
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Hello uday12,

Thanks for the note.

The developers made the default 20 bars if no BarsReqiredToPlot is defined. The MA will always begin plotting at the 20th bar. You can set the BarsReqiredToPlot = 0 if you want to override the property.

Please let us know if we may be of any further assistance.
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Old 07-19-2018, 09:40 AM   #3
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Quote:
Originally Posted by NinjaTrader_ChrisL View Post
Hello uday12,

Thanks for the note.

The developers made the default 20 bars if no BarsReqiredToPlot is defined. The MA will always begin plotting at the 20th bar. You can set the BarsReqiredToPlot = 0 if you want to override the property.

Please let us know if we may be of any further assistance.
Chris,

I had another question. Suppose I want to set the BarsRequiredToPlot as a function of some parameter Period.

Suppose I set BarsRequiredToPlot within OnStateChange() such as

----

if (State == State.SetDefaults)
{
BarsRequiredToPlot = (int)Math.Sqrt(Period);
}

----

the code compiles fine.

But then when I try the indicator on a chart, I get an error in the log "Error on calling 'OnStateChange' method: Object reference not set to an instance of an object.".

Removing the BarsRequiredToPlot line from the code seems to remover the error during plot the indicator.

In which State can I assign a value to BarsRequiredToPlot when the value of BarsRequiredToPlot is a function of input parameters?
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Old 07-19-2018, 10:47 AM   #4
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Hello uday12,

Thanks for the reply.

I was able to do this in State.Configure. You would need to make sure that the Period property is set before you try to use it in a formula.

Please let us know if we may be of any further assistance.
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