BarType OnDataPoint Question

[kevinenergy]

In the RangeBarsType class contains the following code:

    protected override void OnDataPoint(Bars bars, double open, [B]double high, double low, double close[/B], DateTime time, long volume, bool isBar, double bid, double ask)
        {
            if (SessionIterator == null)
                SessionIterator = new SessionIterator(bars);

            bool isNewSession = SessionIterator.IsNewSession(time, isBar);
            if (isNewSession)
                SessionIterator.GetNextSession(time, isBar);
            if (bars.Count == 0 || bars.IsResetOnNewTradingDay && isNewSession)
                AddBar(bars, open, high, low, close, time, volume);
            else
            {
[B]                double        barClose    = bars.GetClose(bars.Count - 1); 
                double        barHigh        = bars.GetHigh(bars.Count - 1); 
                double        barLow        = bars.GetLow(bars.Count - 1); [/B]
                double        tickSize    = bars.Instrument.MasterInstrument.TickSize;
                double        rangeValue    = Math.Floor(10000000.0 * bars.BarsPeriod.Value * tickSize) / 10000000.0;

bars.GetClose(bars.Count - 1) gets the close of the current bar. How is this different from the close parameter that is being passed into the OnDataPoint method?

Also: Is there a tutorial anywhere that explains how BarType classes work?

[NinjaTrader_Jim]

Hello kevinenergy,

Thanks for your post.

bars.GetClose will reference the close value from the Bars object you are building with the BarsType, while OnDataPoint will give the OHLC values from the underlying data series that builds the bar. For example, using a tick based, minute based, or daily based bar.

OnDataPoint documentation can be referenced here - https://ninjatrader.com/support/help...ndatapoint.htm

BarsType documentation can be found here - https://ninjatrader.com/support/help.../bars_type.htm

We do not have any additional tutorial information on BarsTypes, but I may suggest using the open source BarsTypes as reference as well as other free and open source bars types that are available from User App Submissions.

Misc. NinjaTrader 8 user submissions - https://ninjatraderecosystem.com/use...atrader-8-misc

Please let us know if we can be of further assistance.

[kevinenergy]

bars.GetClose will reference the close value from the Bars object you are building with the BarsType, while OnDataPoint will give the OHLC values from the underlying data series that builds the bar. For example, using a tick based, minute based, or daily based bar.

This is very helpful info Jim - thanks for the clarification. I managed to make a new Bar Type! They should consider adding the above to the OnDataPoint docs page; it is succinct and massively helpful for understanding how BarTypes work.

Thanks again!