Importance of "vol" in external feed using NtDirect

[Atomic]

This is some of the code from the NtDirect.dll.
if LastBarOnChart then begin
if lastCurrentBar <> CurrentBar then begin
vol = Volume;
lastVolume = 0;
end else begin
vol = Volume - lastVolume;
end;
lastCurrentBar = CurrentBar;
lastVolume = lastVolume + vol;

Ask(GetSymbolName, CurrentAsk, AskSize);
Bid(GetSymbolName, CurrentBid, BidSize);
Last(GetSymbolName, Close, vol);
end;

Does the value of vol play any role in the trading of the sim account?

[NinjaTrader_Joydeep]

Hello Atomic,
Volume cannot be zero. Also the Ask, Bid and Last is used to append quotes to NinjaTrader (using the external data feed connection) from your custom applciation.

Please refer here to know more about the functions of the NTDirect/Client.dll

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?functions.htm

[Atomic]

Hello Atomic,
Volume cannot be zero. Also the Ask, Bid and Last is used to append quotes to NinjaTrader (using the external data feed connection) from your custom applciation.

Please refer here to know more about the functions of the NTDirect/Client.dll
http://www.ninjatrader.com/support/h...?functions.htm

I have modified the code as below, and it does not seem to matter.
if LBOC then begin
Ask(Smbl, CurrentAsk, AskSize);
Bid(Smbl, CurrentBid, BidSize);
Last(Smbl, Close, ticks);
end;

where Smbl = getsymbolname and LBOC is just lastbaronchart.

[NinjaTrader_Joydeep]

Hello Atomic,
Unfortunately we only provide limited support for the dll interface. You can refer to this help guide for further reference.

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?functions.htm

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?functions2.htm

I leave this thread open for any forum member who may assist you further.