CalculateOnBarClose issue

[redbank199]

I run an indicator on a 5 minute chart. The indicator does nothing but print a log message with
CalculateOnBarClose set to true. I would expect to see the log message printed in the Log once for every 5 minutes. However, I am seeing many messages that seem to suggest that
NT prints out the message for every tick. I did make sure "CalculateOnBarClose" is set to true
when I added the indicator to the chart. What was wrong with the following indicator code ?

Peter

-------

protected override void Initialize()
{
Add(new Plot(Color.FromKnownColor(KnownColor.Orange), PlotStyle.Line, "Plot0"));
CalculateOnBarClose = true;
Overlay = false;
PriceTypeSupported = false;
}

protected override void OnBarUpdate()
{
Log("Test CalculateOnBarClose", NinjaTrader.Cbi.LogLevel.Information);
Plot0.Set(Close[0]);
}

[NinjaTrader_Jason]

Hello redbank199,

Please see the link below.

http://www.ninjatrader-support.com/HelpGuideV6/CalculateOnBarClose1.html

It needs to be the last statement in the Initialize() method.

[roonius]

I run an indicator on a 5 minute chart. The indicator does nothing but print a log message with
CalculateOnBarClose set to true. I would expect to see the log message printed in the Log once for every 5 minutes. However, I am seeing many messages that seem to suggest that
NT prints out the message for every tick. I did make sure "CalculateOnBarClose" is set to true
when I added the indicator to the chart. What was wrong with the following indicator code ?

Peter

-------

protected override void Initialize()
{
Add(new Plot(Color.FromKnownColor(KnownColor.Orange), PlotStyle.Line, "Plot0"));
CalculateOnBarClose = true;
Overlay = false;
PriceTypeSupported = false;
}

protected override void OnBarUpdate()
{
Log("Test CalculateOnBarClose", NinjaTrader.Cbi.LogLevel.Information);
Plot0.Set(Close[0]);
}

If you see many messages it does not mean that they are printing every tick.
You probably received a message for every historical bar on your chart.

[redbank199]

Moving CalculateOnBarClose to the end of the Initialize method did fix the problem.

However, this means the indicator wizard has a bug - the code in my original post was generated by the wizard; the generated code should have placed the call at the end of Initialize method.

I am surprised to learn from this that where you put CalculateOnBarClose in Initialize
would have impact on the execution of OnBarUpdate. I have thought that OnBarUpdate
is not called until Initialize is called, and once Initialize is called, NT should know the
I have set CalcualteOnBarClose to true, and therefore every call to OnBarUpdate would
check against CalcualteOnBarClose flag, regardless of where I put CalculateOnBarClose
in Initialize, and knows that OnBarUpdate should not be executed at all until a bar
is completed.

I guess I do not know how NT executes the script. Could you explain why the placement
of CalculateOnBarClose in Initialize have impact on the execution of OnBarUpdate ?

[redbank199]

Some of the NT supplied indicators, e. g., ParabolicSAR, do not place CalculateOnBarClose
at the end of the Initialize call. These are bugs too and should be changed.

[NinjaTrader_JoshP]

Not sure what you mean. CalculateOnBarClose can be placed anywhere in Initialize(). System indicators do NOT set CalculateOnBarClose settings for indicators.

CalculateOnBarClose goes into Initialize(). OnBarUpdate() is absolutely influenced by what this setting is. OnBarUpdate() always happens after Initialize().

[redbank199]

Jason's post stated that CalculateOnBarClose needs to be the last statement in
Initialize() method.

So this Initialize() in ParabolicSAR (and other indicator codes) should be changed from

protected override void Initialize()
{
Add(new Plot(Color.OrangeRed, PlotStyle.Dot, "Parabolic SAR"));
CalculateOnBarClose = true; // Call 'OnBarUpdate' only as a bar closes
Overlay = true; // Plots the indicator on top of price
}

to

Add(...);
Overlay ...;
CalculateOnBarClose = true;