MarketDataEvnArgs or GetCurrentAskVolume

[sdauteuil]

I am trying to get a running sum of block bid and ask volumes that have actually transpired... i.e. Sum ask volume > 4

Which is correct to use

GetCurrentAskVolume()... Is this actual trading volume that has transpired or is this the volume currently being offered at the asking price?

Or

OnMarketData

protected override void OnMarketData(MarketDataEventArgs marketDataUpdate)

if (marketDataUpdate.MarketDataType == MarketDataT ype.Ask)
Print("Ask = " + marketDataUpdate.Price + " " + marketDataUpdate.Volume);


Under OnMarketData() The help guide says this method does not return a value

https://ninjatrader.com/support/helpGuides/nt8/?marketdataeventargs.htm

Method Return Value
This method does not return a value.

Although the page under MarketDataEvnArs indicates it returns a double value


Thank you for clarifying

[NinjaTrader_ChelseaB]

Hello sdauteuil,

These essentionally would be the same.

GetCurrentAskVolume() gets the snapshot volume of the most recent ask update at the time it's requested.

OnMarketData()'s argument.Volume is that same data, but from every update, processed in order, instead of just when requested.

OnMarketData does not return a value. This is a void. The argument (marketDataUpdate) has the data. If you need this outside of OnMarketData, then you would need to save that information to a variable or array.

Some of the argument properties are doubles like .Ask and .Bid and some are longs like .Volume. Some properties are bools like .IsReset or instruments like .Instrument. The arugument and the arguments properties are not returned, as you cannot call OnMarketData() yourself as a calling method. NinjaTrader calls OnMarketData() and provides the data to the argument.
https://ninjatrader.com/support/help...aeventargs.htm

[sdauteuil]

Thank you for the clarification