indicators with @ in the front

[uday12]

I saw a code on this forum SampleGetHighLowByTimeRange.cs which uses two other indicators @MIN.cs and @MAX.cs.

(1) Why does an indicator code have a "@" in front of the name? Does the "@" indicate that it is meant to be callable from another code?

(2) If yes, then how does the a code X that calls an indicator in code Y, know within its code that it needs to use an external file code Y to read that indicator?

[NinjaTrader_ZacharyG]

Hello uday12,

Thank you for writing in.

The @ sign in front of the name simply means that this is a system indicator that was included with NinjaTrader.

Please, let us know if we may be of further assistance.

[balltrader]

1. I think it is similar to an include statement, or treating that script as a function that is called and returning a value.

2. I think when ninjatrader starts up, all indicator script file class names are loaded or registered into it's memory, so when it makes a call to Max or Min, it if can't find it in it's memory, it throws an error.

[uday12]

1. I think it is similar to an include statement, or treating that script as a function that is called and returning a value.

2. I think when ninjatrader starts up, all indicator script file class names are loaded or registered into it's memory, so when it makes a call to Max or Min, it if can't find it in it's memory, it throws an error.

Suppose I create two indicators IND1 and IND2, and I save IND1 as @IND1. Then can I call IND1 within the IND2 code, or do I need to do anything special?

[NinjaTrader_ZacharyG]

Hello uday12,

You do not need an @ in front of the indicator's file name in order to call the indicator from another indicator.

The @ only signifies that the indicator is an indicator included with NInjaTrader by default.