Is ITradeData.PriceTick always null?

Hi.

I changed the sample code "Usage Example Time series API" in the following manner:

    public class TimeSeriesRequestExample
    {
        private readonly ITimeSeriesDataService timeSeries;
        private ITimeSeriesDataRequest request;


        public TimeSeriesRequestExample(ITimeSeriesDataService timeSeries)
        {
            this.timeSeries = timeSeries;
        }


        public void Launch()
        {
            Console.WriteLine("[2] Time series request example");
            Console.WriteLine("");

            request = timeSeries.SetupDataRequest("TFXDAX")
                .WithView("TRDPRC_1")
                .WithAllFields()
                .WithTimeZone(TimezoneType.Instrument)
                .WithInterval(CommonInterval.Trades)
                .From(new DateTime(2018, 6, 6, 15, 0, 0))
                .To(new DateTime(2018, 6, 7, 5, 0, 0))
                .OnDataReceived(DataReceivedCallback)
                .CreateAndSend();
        }


        private void DataReceivedCallback(DataChunk chunk)
        {
            foreach (ITradeData bar in chunk.Records.ToTradeRecords())
            {
                int priceTick = -1;
                if (bar.PriceTick != null) priceTick = (int)bar.PriceTick.Value;
                Console.WriteLine(
                        "{0} {1} {2} {3} {4} {5} {6} {7} {8} {9}",
                        bar.Timestamp.Value.ToString("yyyy/MM/dd HH:mm"),
                        bar.Last.Value.ToString("##.0"),
                        bar.TradePrice.Value.ToString("##.0"),
                        bar.TradeVolume.Value.ToString("N0"),
                        bar.BestBid.Value.ToString("##.0"),
                        bar.BidSize.Value.ToString("N0"),
                        bar.BestAsk.Value.ToString("##.0"),
                        bar.AskSize.Value.ToString("N0"),
                        priceTick,
                        bar.Vwap.Value.ToString("##.0")
                    );
            }

            if (!chunk.IsLast) return;


            request = null;
            Program.StopMessagePump();
        }
    }

But, it seems that PriceTick of ITradeData always returns null value.

Is there any configuration that I am missing?

What I am trying to do is what we can get using the RHistory() function in Excel.

Specifying in the second parameter of this function "TRDPRC_1.Timestamp;TRDPRC_1.Value;TRDPRC_1.Trdprc_1;TRDPRC_1.Count;TRDPRC_1.Bid;TRDPRC_1.Bidsize;TRDPRC_1.Ask;TRDPRC_1.Asksize;TRDPRC_1.Prctck_1;TRDPRC_1.Vwap"

I have confirmed that all values, except of TRDPRC_1.Prctck_1, are equal to that I get using the C# code above. And TRDPRC_1.Prctck_1 return values 1 or 2 (and not blank or null).

So, the question is "what is the equivalent of TRDPRC_1.Prctck_1 in the time series API?"

Regards