What's the problem if I add enterLong() inside of Indicator() instead of Stragtegy()?

[localappleseed]

https://ninjatrader.com/support/help...vel_ii_dat.htm has sample scripts for level 2 book. The book is implemented in the space of Indicator(). What if I add EnterLong() inside of OnBarUpdate() under Indicator()? Is this doable or I have to call EnterLong() under Strategy()? Thanks.

[bltdavid]

What if I add EnterLong() inside of OnBarUpdate() under Indicator()?

You should receive a compilation error.

Is this doable or I have to call EnterLong() under Strategy()?

Did you try it?
The 'Indicator' class does not provide that method.

Think about it:
When your code does this,

namespace NinjaTrader.NinjaScript.[COLOR=#e74c3c]Indicators[/COLOR]
{
   public class MyXXX : [COLOR=#e74c3c]Indicator[/COLOR]
   {
   ...
   }
}

your class 'MyXXX' inherits all the methods provided by the base class 'Indicator'.
The 'Indicator' class does not have a method called 'EnterLong', so you should
receive a compilation error if you do that.

On other other hand,
When your code does this,

namespace NinjaTrader.NinjaScript.[COLOR=#e74c3c]Strategies[/COLOR]
{
   public class MyXXX : [COLOR=#e74c3c]Strategy[/COLOR]
   {
   ...
   }
}

your class 'MyXXX' inherits all the methods provided by the base class 'Strategy'.
The 'Strategy' class does have a method called 'EnterLong', so no error occurs.

Btw, the exact same class name 'MyXXX' is allowed -- this is not an error.
Why? Because the two 'MyXXX' classes are in different namespaces.

It's a bit confusing, because the base classes 'Indicator' and 'Strategy' provide
a huge amount of overlap in the methods they provide -- for example, both
classes have methods called 'Print', 'Alert', 'OnBarUpdate', etc etc.

But only 'Strategy' provides the order methods.

[NinjaTrader_PaulH]

Hello localappleseed,

Thanks for your post.

Member bltdavid has provided a comprehensive reply (Thank-you)

To confirm, you do need to be in a strategy to use the Entry methods.

[localappleseed]

Thank you very much for your detailed answer!