Multi time frame basic use error

[savekad]

I was experiencing calling an indicator with a different input off of an indicator. For some reason I couldn't get it to work even with the simplest code. The anticipated result is just two panels on the chart window (an ES 09-12 Weekly).

A1 - The indicator that calls:
protected override void Initialize()
{
Add(new Plot(Color.FromKnownColor(KnownColor.Orange), PlotStyle.Line, "Plot0"));
Overlay = false;
Add(PeriodType.Day, 1);
}
protected override void OnBarUpdate()
{
Plot0.Set(Close[0]);
A2(BarsArray[1],1);
}

A2 - The indicator that is being called:
protected override void Initialize()
{
Add(new Plot(Color.FromKnownColor(KnownColor.Orange), PlotStyle.Line, "Plot0"));
Overlay = false;

}
protected override void OnBarUpdate()
{
Plot0.Set(Close[0]);

}

[NinjaTrader_Bertrand]

savekad, is there any error returned in the Control Centers log tab as the study is applied? So the base chart that adds the script is your weekly chart?

[savekad]

Hi, sorry for the delay.

No, there are no errors on the log.
Yes, the base chart is Week.

I'm using the free Kinetick End-of-Day free data feed and I've noticed it can't supply me with 60 min bars data for some reason.

[NinjaTrader_Bertrand]

Thanks, the free Kinetick End of Day connection would not provide intraday data, it would offer daily intervals and higher only.

Plotting daily data on a weekly chart would not be a useful setup, as the plotting would be limited by the primary bars timestamps, so I would suggest you add a weekly series and plot this from the daily chart.

With an OnBarUpdate() in A1 changed to :

if (BarsInProgress != 0 || CurrentBars[0] < 0 || CurrentBars[1] < 0)
return;

Plot0.Set(A2(BarsArray[1])[0]);

[savekad]

I've even simplified it a bit more and still - Output is empty.

A1:

protected override void Initialize()
{
Overlay = false;
Add(PeriodType.Week, 1);
}
protected override void OnBarUpdate()
{
if (BarsInProgress != 0 || CurrentBars[0] < 0 || CurrentBars[1] < 0) return;
A2(BarsArray[1]);
}


A2:

protected override void Initialize()
{
Overlay = false;
}
protected override void OnBarUpdate()
{
Print("A2 OBU invoked.");
}

Base chart is of a Day period type.

[NinjaTrader_Bertrand]

Can you please clarify what you expect to see from -

A2(BarsArray[1]);

Did you try with my supplied code sample that would actually set a value to plot?

[savekad]

I expected to see prints at the Output window that says "A2 OBU invoked." for every A2 OBU call for each bar of the BarsArray[1] was passed to it.

About your suggestion, I had to change:

Plot0.Set(A2(BarsArray[1])[0]);

to:

Plot0.Set(A2(BarsArray[1], 1)[0]);

in order for it to compile but even afterwards, result was the same - only one plot on the chart.

So... Any idea why nothing prints? I'm clearly missing some basic thing here.

[NinjaTrader_Bertrand]

Since you never request a value from the method, it would not be called - as such you don't see your embedded prints - try for example -

double test = A2(BarsArray[1])[0];

Without plotting anything...it should trigger your prints, as A2 bar update would be called then.

[savekad]

Oh, OK. I'll try that.

Might as well worth adding it to your great Help article at:

http://www.ninjatrader.com/support/helpGuides/nt7/multi_time_frame__instruments.htm

[savekad]

Couldn't get it to work. Please take a look at the attached scripts.

[NinjaTrader_Bertrand]

Please just try accessing a double value from your called script, like I provided in my example call.

The variable here you try to access was never exposed to be accessed by another script.

http://www.ninjatrader.com/support/forum/showthread.php?t=4991

[savekad]

DAMN! you were totally right!

Sorry for not sticking with the original case I presented. It's just that the whole plotting this is unfamiliar to me as I only use horizontal lines and prints in my indicators.

From the tests I made I found out that by calling Update(), I was able to invoke the OBU of the remote indicator even without accessing a variable. Same thing is what made your instruction work - calling a var is basically activating its get property which suppose to include a call to Update().

Please verify or correct the statements I've made.

[NinjaTrader_Bertrand]

You are welcome and correct - the Update() would be needed here to ensure the called script OBU() is called before the variable is returned, so it's up to date. If you expore or access a series this would not be needed. The reason is that NT's internal model is optimized to avoid any unneeded calls for performance.

[savekad]

Bertrand, thank you for all your help.

I have another issue. Is there any reason why I'm able to see prints but not horizontal lines using the following script?

A1

protected override void Initialize()
{
Overlay = true;
Add(PeriodType.Day, 1);
}
protected override void OnBarUpdate()
{
if (BarsInProgress == 0)
{
Print("A1 OBU invoked on CurrentBar " + CurrentBar);
Print(" ");
}
if (BarsInProgress == 1)
{
A2(BarsArray[1]).Update();
}
}


A2

protected override void Initialize()
{
Overlay = true;
}
protected override void OnBarUpdate()
{
Print("A2 OBU invoked on CurrentBar " + CurrentBar);
DrawHorizontalLine("line1", 1400.00, Color.Blue);
DrawHorizontalLine("line2", Close[0], Color.Blue);
Print(" ");
}

[NinjaTrader_Bertrand]

You're welcome, only strategies could Add other indicators for display purposes - http://www.ninjatrader.com/support/f...ead.php?t=3228

You just call a value from an indicator, you could not add other indicators through your script.