why is market data showing negative prices

[junkone]

I have this simple logic to print out the market data and it shows negative prices and proper prices for Ask. I am using IB as data provider

the data is
123.26'5
-9223372036854780.00'0
-9223372036854780.00'0
123.26'5
-9223372036854780.00'0
123.26'5
-9223372036854780.00'0
-9223372036854780.00'0
123.26'6
-9223372036854780.00'0
123.26'6
-9223372036854780.00'0
-9223372036854780.00'0
-9223372036854780.00'0
123.26'7
-9223372036854780.00'0
123.26'7
-9223372036854780.00'0
-9223372036854780.00'0
-9223372036854780.00'0
-9223372036854780.00'0
-9223372036854780.00'0
-9223372036854780.00'0

protected override void OnMarketData(MarketDataEventArgs marketDataUpdate)
		{
			Print(SuperDom.Instrument.MasterInstrument.FormatPrice(marketDataUpdate.Ask));
//            if (limitprice > 0 && marketDataUpdate.Ask < limitprice)
//            {
				
//                Print(DateTime.Now + SuperDom.Instrument.FullName + limitprice + "Crossed below ask" +  String.Format("{0:0.0000}",SuperDom.Instrument.MasterInstrument.FormatPrice(marketDataUpdate.Ask)));       
//            }
			
		}

[NinjaTrader_Jesse]

Hello,

I believe this is caused by the syntax you are using and also by the syntax that is missing.

Because you are not filtering what event specifically you want to print, you are printing the Ask object from Last, Ask and Bid events which it is only valid for Last events.

I believe what you are instead looking for would be one of the following:

if(marketDataUpdate.MarketDataType == MarketDataType.Last)
{
	Print("Last: " + marketDataUpdate.Price + " Ask: " + marketDataUpdate.Ask+ " Bid: " + marketDataUpdate.Bid);
}
			
if(marketDataUpdate.MarketDataType == MarketDataType.Ask)
{
	Print("Ask: " + marketDataUpdate.Price);
}

if(marketDataUpdate.MarketDataType == MarketDataType.Bid)
{
	Print("Bid: " + marketDataUpdate.Price);
}

I look forward to being of further assistance.