Need help

[corineaty]

Hi, great to be a member in this forum

I´m trying to modify the VolumeProfile indicator and I looked for info on OnMarketData method, and MarketDataType but I didn´t what conditions identify each value of MarketDataType.Type, when it takes Bid, Ask, voice over artists last what exactly does it means. Can anyone tell me more on this because NT help is too poor on this

Big thanks

[NinjaTrader_Jim]

Hello corineaty,

Thanks for your post.

OnMarketData allows us to read Level 1 data in our script. We get Bid/Ask and Last updates. Last represents an actual buy or sell that has occured. You can differentiate a Last tick to be a buy or sell depending on if the price of the last tick is greater than the ask or less than the bid.

From the BuySellVolume indicator:

if(e.MarketDataType == MarketDataType.Last)
{
    if(e.Price >= e.Ask)
        buys += (Instrument.MasterInstrument.InstrumentType == Cbi.InstrumentType.CryptoCurrency ? Core.Globals.ToCryptocurrencyVolume(e.Volume) : e.Volume);
    else if (e.Price <= e.Bid)
        sells += (Instrument.MasterInstrument.InstrumentType == Cbi.InstrumentType.CryptoCurrency ? Core.Globals.ToCryptocurrencyVolume(e.Volume) : e.Volume);
}

If we checked if(e.MarketDataType == MarketDataType.Bid) we would be looking at all bids that come through the level 1 data feed, not necessarily a an actual trade since actual trades would be qualified as a Last tick.

OnMarketData documentation can be found below.

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

We look forward to assisting.