Syncing Data Series From different scripts & Best Practices

[Aviram Y]

• Hello, I have a few questions and would like some help.
• I’m building a strategy, and in a stage where i want to separate a lot of logic onto different scripts so i can reuse a lot of it in other strategies in the future, since i came from Godot (Game development engine using GDscript, a built in scripting language), and learnt in this enclosed environment, I might be missing some basic knowledge about classes and extensions beyond some basic things.
• Referrals to the right documentation would very much help, but detailed answers (if needed) would be even more appreciated.

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• 1. When creating a custom class that returns different data types that are dependent on bar series from the strategy, how can i make sure that the strategy calling the class methods, and the class are using the same data series, and that those series are synced?
• 2. When creating a custom class, depending on the classes use, whether its an indicator, or a class that returns custom mathematical calculations, what would be considered best practice to create that new class depending on its use, i know that a custom indicator for example is created via the indicators Folder in the editor, but something less obvious to me is the latter.
  
  Thanks in advance! Aviram Y.

[NinjaTrader_ChrisL]

Hello, thanks for writing in.

You can set up a partial class or a regular class and pass in the IndicatorBase or StrategyBase object like shown here:

https://forum.ninjatrader.com/forum/ninjatrader-8/add-on-development/1039281-passing-indicator-or-strategy-into-class

The best place to put lose .cs files in the Addon folder, there you can define your own custom namespaces, classes and custom reusable code.

Kind regards,
-ChrisL

[Aviram Y]

Thank you for the response, i will try this out!
And what about question No.1? i have read about TriggetCustomEvent method in the documentation, is it the right way to approach synchronization between a custom indicator and a strategy that doesn't rely on OnBarUpdate for example?

[MicroTrends]

Thank you for the response, i will try this out!
And what about question No.1? i have read about TriggetCustomEvent method in the documentation, is it the right way to approach synchronization between a custom indicator and a strategy that doesn't rely on OnBarUpdate for example?

use a internal double property instead of a series[0] and populate the doulbe with the most recent data let the strategy call that at any time

eg:

var value = myindcator1.MyValueB;

typically onBarUpdate is used for reading/.setting and doing actions
onMarketUpdate can be used but will end up with errors due to series/barsarray alignment so you can use TriggetCustomEvent and
myindcator1.Update()
the read from a series
myindcator1.Values[0][0];

or easier more robust myindcator1.MyValueB;


You can use this to speed up development of a strategy and have very useful features off the shelf. all open source.

https://github.com/MicroTrendsLtd/NinjaTrader8

[NinjaTrader_ChrisL]

Hi, the TriggerCustomEvent method is used to synchronize the data series when you need to access data from the data series in a non-data-driven event, it has nothing to do with inter-communication between NinjaScript objects. Doing something like this goes beyond the scope of support I am able to provide on the subject, but I have made an example here demonstrating how to set up a property changed event to keep subscribed objects aware of value changes of a global variable:

https://forum.ninjatrader.com/forum/ninjatrader-8/indicator-development/103089-mysharedmethodsaddonexample

Kind regards,
-ChrisL