Making indicator value accessable to new indicator

[Pete77]

I have written an indicator in which my calculations are done in the "if(BarsInProgress == 1" section (45 Min) and the objects generated show up in the primary series. This indicator will only work in the "CalculateOnBarClose = true" configuration.

I would like to create an alert for this program in a second indicator. for instance a 1 min chart which would have to be in the "CalculateOnBarClose = false mode. My alert would trigger when a price crosses a line the value of which has to come from the "ifBarsInProgress ==1" section of the first indicator. The value of this line will change every 45 minutes.

Can anyone tell me the procedure for the second indicator read the values from the first or at least lead me to an example?

[NinjaTrader_ChelseaB]

Hello Pete77,

You can call an indicator by typing the name followed by parenthesis.
You will be able to call values of plots that are set.

For example if my indicator is called MyIndicator and there is only one plot you could use:

Print(MyIndicator()[0]);

http://ninjatrader.com/support/helpGuides/nt7/plot_class.htm

http://ninjatrader.com/support/helpGuides/nt7/value.htm

[Pete77]

Thanks. In Properties I am trying to expose two variables that have been calculated in the "BarsInProgress == 1" part of my indicator but get error message. Is there any way to access these variables so they will be recognized in Properties?

[NinjaTrader_AlanP]

Hello Pete77,

I have provided a reference example demonstrating how you could reference variables calculated within another indicator.

http://ninjatrader.com/support/forum/showthread.php?t=5782

Please let us know if you need further assistance.

[Pete77]

Thank you. I am a beginner and having trouble describing my problem.
I see there are several ways to pass a value from Indicator 1 to Indicator 2.
The variable (the changing value of) I am trying to make accessible to indicator 2 is calculated in and resides in the secondary series of indicator 1.(The area of BarsInProgress == 1)

Is this not a problem? If it is, how can I make it accessible to Properties in indicator 1.?
At present I am getting an error message when I try to expose the variable in Properties.

[NinjaTrader_AlanP]

Hello Pete77,

To reference a indicators values from another indicator please see the reference example, Exposing Indicator Values that are not plots at the following link,

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

Please let us know if you need further assistance.

[Pete77]

When I try to expose a variable in Properties I get the following attached error message. Can you explain?

[NinjaTrader_AlanP]

Hello Pete77,

If you’d like to share a copy of the strategy you’re running, I can take a look and see if anything jumps out.

I look forward to your reply.

[Pete77]

recursive properties

Hi Alan

Sorry for late reply. I will attach a barbones version of my program. The program works well and it has actually helped with my trading. I wrote it very quickly but have struggled for weeks to create an alert for same.

The program works only with CalculatedOnBarClose= true so I assume the I need a hosted program that will calculate on ticks on which to create the alert. My problem is that I can't access the two variables that I need to do the alert. When you see the code you can probably see why.

By the way I am very much a novice with C# and NinjaScript. For example I can't find any explanation of "set",What is this used for anyway?

Pete

[NinjaTrader_AlanP]

Hello Pete77,

At the bottom of your indicator you have public double bp commented out. If you were to capitalize the first letter bp to Bp you should not receive this error.

If you add this under #region properties at the bottom of your indicator Test,

[Browsable(false)]
[XmlIgnore()]
public double BP
{
get { return bp; }
}

From your strategy, you’ll be able to reference BP via adding the following under Initialize,

Add(Test()); //Calling the name of your indicator

Then under you could then reference BP under OnBarUpdate(), for example,

if(Test().BP>1)
{
DrawArrowDown( "My Down arrow" + CurrentBar, false, 0 , High[0], Color.Red);
}

Which will draw an error anytime BP as calculated by your indicator is over 1.

Please let us know if you need further assistance.

[Pete77]

Thanks very much AlanP, that is an example I can understand!

I am having some trouble the hosted indicator recognizing Add(Test()); I get error:

Indi Argument '1': cannot convert from 'method group' to 'NinjaTrader.Gui.Chart.Line'

The best overloaded method match for 'NinjaTrader.Indicator.IndicatorBase.Add(NinjaTrad er.Gui.Chart.Line)' has some invalid argument

[NinjaTrader_AlanP]

Hello Pete77,

The issue is you are trying to Add an indicator from within another indicator, which you cannot do. If you were to use the code inside a strategy you will not have a problem, or you should copy the logic from one indicator into the other indicator that would work too.

Please let us know if you need further assistance.

[Pete77]

OK, so now using strategy instead of indicator to access Test.cs and bp value and create my alert. I have a couple problems, one is shown on the attached picture.

"bp" in my program is high plus low plus close /3 of the closing 45 minute bar so it changes value every 45 minutes. I understand it is a variable but it sounds like it needs to be a data series. Can you help me with this? Thanks

[NinjaTrader_AlanP]

Hello Pete77,

If you were to use if(CrossAbove(Close, Test().BP,1)) rather than Close[0], are you able to compile?

I look forward to your reply.

[Pete77]

Yes, thanks very very much. I assume that the line will now give me "if price crosses above Test().Bp", then do something,

I have one other problem and hopefully can wrap this up:

In my main program, as opposed to the test program, in its strategy when I "Add(UncleFrank())" under initialize for example I get the error message "NinjaTrader indicator Uncle Frank is a type but it is used like a variable"

Can you help me with that? I have attached the strategy.