Symbol map for External Data Feed not working?

[_vbs_]

When using the external data feed connection, it seems to me that the symbol map is not working correctly (at least not as I undestand it).

I wrote a simple C# application to push quotes into NT using ntdirect.dll. So I call something like:

Ask(<instrumentName>, 1000.0, 1000);

So in NT I created a new instrument in the instrument list:

1. Instrument manager -> New
2. Assign "VBSTEST" as master instrument name
3. Select XETRA as exchange
4. On the Misc-Tab I put "VBSEXT" as symbol name for "External"
5. I add the new instrument VBSTEST to my default list

So I expected I would now have to use the string "VBSEXT" as instrument string when calling the DLL functions (as I have set that as symbol mapping for External). But I see no price updates when I do so:

Ask("VBSEXT", 1000.0, 1000);

But I do see updates when I call the DLL functions using the NT master instrument name:

Ask("VBSTEST", 1000.0, 1000);

Did I misunderstand something? Or is this a bug maybe? Big thanks for your help in advance!

[NinjaTrader_ChelseaB]

Hello _vbs_,

Thank you for your post.

First, I need to mention that using the External data feed to push data from your own external application is not supported by NinjaTrader Support. This connection type was really created to connect to TradeStation and receive data.

I've talked with the developers and they have let me know the mapped name works for the trade station email interface. The NTDirect.dll functions use master instrument name.

So this is expected behavior.