Question on Referencing another Indicator

[JerryWar]

Indicator A which is installed on a chart defines globally and populates a DataSeries whether it be plot or something else.

Indicator B would like to use that DataSeries.

Indicator B can define an instance of Indicator A and access that DataSeries but then we have Two instances of indicator A running.

Is there another method for Indicator B to access that DataSeries directly from the already running version of Indicator A ?

Thanks for any input.

[NinjaTrader_PatrickH]

Hello JerryWar,

Thank you for your post.

Indicator's would not be able to access other indicator's instances. However, in a strategy when adding the indicators you can create instantiated indicators and then plot those and access their values.

For example:

        private SMA sma1;
		private SMA sma2;
		
        protected override void Initialize()
        {
			sma1 = SMA(10);
			sma2 = SMA(20);
			Add(sma1);
			Add(sma2);
        }

Keep in mind this would only work in a strategy.

Please let me know if you have any questions.

[JerryWar]

Patrick
Thanks - That is pretty clear. In this situation , I don't think a strategy is going to get it done.
I do have one follow up question. Inside an indicator when I add a higher level time frame.
Is there anyway to specify a longer barsback period than the barsback set for the root data series. I am trying to conserve resources. If I extend the root data barsback it will tie up too many resources. What I need is for the higher time frame dataseries added in the indicator to
have a longer barsback period but I do not see an overload which will accept that in the Add().

[NinjaTrader_PatrickH]

Patrick
Thanks - That is pretty clear. In this situation , I don't think a strategy is going to get it done.
I do have one follow up question. Inside an indicator when I add a higher level time frame.
Is there anyway to specify a longer barsback period than the barsback set for the root data series. I am trying to conserve resources. If I extend the root data barsback it will tie up too many resources. What I need is for the higher time frame dataseries added in the indicator to
have a longer barsback period but I do not see an overload which will accept that in the Add().

Thank you for your response.

There would not be a means to set the bars back of the secondary series in NinjaTrader 7. In NinjaTrader 8 you can use the barsToLoad overload: http://ninjatrader.com/support/helpG...dataseries.htm

Please let me know if you have any questions.

[JerryWar]

Patrick,
You just made me realize the obvious. All I need do is delay the start of the computations on the root
series and that should eliminate my issue. I also gave more thought to what you said about a strategy and possibly there is a way that can be useful but it requires splitting apart a complex indicator and I had always envisioned going the other way i.e. having my indicator feed my Strategy.

thanks again.
Jerry

[JerryWar]

Patrick,
I want to set the start date/time of my calculations x days back on the root Tick data series. So rather than checking for

" if (CurrentBars[0] < BarsRequired ) return " I want to do something like

if ( Current Day < ( Today(Time[0]) - 2 days) ) return

But I am having trouble with subtraction part because I want to only consider Weekday, trading days excluding holidays. Is there a function that uses the session template that will allow me to calculate this simply. If you have any links or examples that would be great.

Jerry

[NinjaTrader_PatrickH]

Hello JerryWar,

Thank you for your post.

The Session information could be pulled for this purpose: http://ninjatrader.com/support/helpG...t7/session.htm

Please let me know if you have any questions.

[JerryWar]

I seem to be having a fundamental problem in determining Current Day - 2 days regardless of session template. The issue is that I cannot figure out how to get the current Day. I can get the day of any bar
using Today(Time[0]) but I need to know the current day before the indicator winds up to be able to know when to start calculating. Of course I could use the computer Date but then it will not work on Replay data. How do I do this?

thanks

[NinjaTrader_PatrickH]

Hello JerryWar,

Thank you for your patience.

You could pull Time[0].Date or Time[0].Day, whichever you need. Information on what can be pulled from the DateTime object Time can be found at the following link: https://msdn.microsoft.com/en-us/lib...v=vs.110).aspx

Please let me know if you have any questions.