Time Category Message 9/10/2018 5:40:16 PM Default Indicator 'Sample custom series': Error on calling 'OnRender' method on bar 342: You are accessing an index with a value that is invalid since it is out-of-range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.
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Bar out of range
As a test and to learn, I am trying to create a Custom Series, assign values to it, and then Print() those values back out from inside of OnRender(). I am getting the error:
Code: -
Hello swooke,
Thanks for your post.
In your code you are using a barsAgro reference in OnRender which would throw the error you are receiving.
Code:for (int idx = ChartBars.FromIndex; idx <= ChartBars.ToIndex; idx++) { Print(xlkClose[idx]); // This is a barsAgo reference and not a reference to an absolute index. }
From the OnRender documentation:
5. Unlike market data events and strategy order related events, there is NO guarantee that the barsAgo indexer used for Series<T> objects are in sync with the current bars in progress. As a result, you should favor using an absolute index method to look up values (e.g., <series>.GetValueAt(), Bars.GetOpen(), etc)
Values from absolute indexes can be retrieved from Series<t> objects by using the GetValueAt method. To observe the differences you may see in OnBarUpdate that Close.GetValueAt(CurrentBar) would be the same as Close[0];
GetValueAt - https://ninjatrader.com/support/help...getvalueat.htm
I have included a link to an Ichimokou Cloud indicator I wrote that processes 2 custom Series<doubles> to draw a region. You can observe how this indicator uses absolute references in place of barsAgo index.
Ichimokou Cloud - https://ninjatrader.com/support/foru...tid=-1&lpage=1
I've also provided a link to our Using SharpDX for custom rendering page of the help guide for important tips and best practices while using SharpDX.
Using SharpDX for custom rendering - https://ninjatrader.com/support/help..._rendering.htm
Please let us know if we can be of further assistance.JimNinjaTrader Customer Service
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