NT Ninjascript General Questions

[RiversideDude]

When do these events get created?

OnFundamentalData()
OnMarketDepth()
OnAccountItemUpdate()
OnExecutionUpdate()
OnOrderTrace()
OnOrderUpdate()
OnPositionUpdate()

What causes the green bar to show up on the left side in the Ninjascript editor?

Where is the default quantity set?
EnterShort(Convert.ToInt32(DefaultQuantity), "");

Thanks in advance!!

[NinjaTrader_ChelseaB]

Hello RiversideDude,

I'm unsure of your first question.

Are you asking about the internal code of NinjaTrader of where these methods are declared behind the scenes? (Where these are created?)

Or are you asking when these methods are triggered?
If you are asking when these are triggered, I would recommend looking each method up in the help guide which will state when each method is triggered. For example OnFundamentalData() is triggered when fundamental data is received. OnMarketDepth is triggered when there is a change in Level II data. etc.
OnFundamentalData() - http://ninjatrader.com/support/helpG...mentaldata.htm
OnMarketDepth() - http://ninjatrader.com/support/helpG...arketdepth.htm
OnAccountItemUpdate() - http://ninjatrader.com/support/helpG...itemupdate.htm
OnExecutionUpdate() - http://ninjatrader.com/support/helpG...tionupdate.htm
OnOrderTrace() - http://ninjatrader.com/support/helpG...ordertrace.htm
OnOrderUpdate() - http://ninjatrader.com/support/helpG...rderupdate.htm
OnPositionUpdate() - http://ninjatrader.com/support/helpG...tionupdate.htm

The green line highlighter on the left of the NinjaScript Editor will appear on lines with changes after the changes have been compiled.

The Default quantity is set in the Strategy Parameters by the user running the script. See 'Set order quantity' on the Running a NinjaScript Strategy page of the help guide.

http://ninjatrader.com/support/helpGuides/nt8/en-us/index.html?running_a_ninjascript_strategy.htm#UnderstandingStrategyProperties

[RiversideDude]

So right now I only have two event procedures in my strategy. I read the documentation and it says what they are and what they do, but what it doesn't say is when the code snippet gets added. Do I need to manually add them?

Thanks!!

[NinjaTrader_ChelseaB]

Hello RiversideDude,

What you mean by event procedures?

When you want the logic to trigger?

Likely you would add the logic to OnBarUpdate.

If you would like to take on learning NinjaScript, we have a fully documented help guide which will help you get started with Ninja Script. You will find language references to all of the methods and functions you will be using. You will also see a tutorial section which will help you create your first indicator and get you started with some of these concepts.
A link to our Help Guide with set of specific tutorials for creating conditions in the NinjaTrader 8 Strategy Builder in the NinjaTrader 8 help guide:

http://ninjatrader.com/support/helpGuides/nt8/en-us/strategybuilder_condition_builder.htm

The entire Alphabetical Reference can be found with the following link:

http://ninjatrader.com/support/helpGuides/nt8/en-us/alphabetical_reference.htm

The best way to begin learning NinjaScript is to use the Strategy Builder. With the Strategy Builder you can setup conditions and variables and then see the generated code in the NinjaScript Editor by clicking the View Code button.

I'm also proving a link to a pre-recorded set of videos 'Strategy Builder 301' and 'NinjaScript Editor 401' for you to view at your own convenience.
Strategy Builder 301 - https://www.youtube.com/watch?v=HCyt...We0Nf&index=10
NinjaScript Editor 401 - https://www.youtube.com/watch?v=BA0W...ZmVnauWXkWe0Nf

If you are new to C#, to get a basic foundation for the concepts and syntax used in NinjaScript I would recommend this section of articles in our help guide first:

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

I am also linking you to the Educational Resources section of the Help Guide to help you get started with NinjaScript:

http://ninjatrader.com/support/helpGuides/nt8/en-us/educational_resources.htm

We also have a few tutorials in our NinjaTrader 7 help guide for both Indicators and Strategies.

http://www.ninjatrader.com/support/helpGuides/nt7/indicators2.htm

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

You will find Reference Samples online as well as some Tips and Tricks for both indicators and strategies:
Click here to see our NinjaScript Reference Samples: http://www.ninjatrader.com/support/f...splay.php?f=30
Click here to see our NinjaScript Tips: http://www.ninjatrader.com/support/f...ead.php?t=3229

These samples can be downloaded, installed and modified from NinjaTrader and hopefully serve as a good base for your custom works.

There is a also a growing library of user submitted custom indicators (100+) that can be downloaded from our support form. Please look in the NinjaScript File Sharing section of our support forum as you may find what you are looking for there: http://www.ninjatrader.com/support/f...splay.php?f=37

[RiversideDude]

Whenever you have an event driven environment like Ninjatrader, the code that fires when the event triggers is called an event procedure, like OnBarUpdate; When an OnBarUpdate event happens, the code, often called a procedure in Microsoft IDEs, executes.

To simplify the question, why do I only have OnBarUpdate and OnStateChange in my strategy?

Thanks!!

[NinjaTrader_ChelseaB]

Hello RiversideDude,

Thank you for clarification with this.

In C# these are called methods.

Below are links to 3rd party educational sites that detail.

https://msdn.microsoft.com/en-us/library/ms173114.aspx

https://www.dotnetperls.com/overload

The Wizard will automatically add OnStateChange and OnBarUpdate because these are both required to be in the script. The other methods are optional and would be added by the developer if the developer would like to use them.
There are some methods already created in NinjaScript that you can overload. You can also create your own methods.

http://ninjatrader.com/support/helpGuides/nt8/en-us/onmarketdata.htm

http://ninjatrader.com/support/helpGuides/nt8/en-us/onmarketdepth.htm

http://ninjatrader.com/support/helpGuides/nt8/en-us/onorderupdate.htm

http://ninjatrader.com/support/helpGuides/nt8/en-us/onpositionupdate.htm

[RiversideDude]

Thanks ChelseaB.