Draw Region on Chart

[Lopat]

Hello I need help: I want to draw a channel medium Draw.Region in my chart. But I don't get any values in the channel. I don't get any errors either. I structured the code like this:

protected override void OnStateChange()

...
AddPlot(new Stroke(channelColor, 2), PlotStyle.Line, "highChannel");
AddPlot(new Stroke(channelColor, 2), PlotStyle.Line, "lowChannel");

highChannel = new Series<double>(this, MaximumBarsLookBack.Infinite);
lowChannel = new Series<double>(this, MaximumBarsLookBack.Infinite);
...


protected override void OnBarUpdate()

... here is some math....

Draw.Region(this, "ChannelRegion", CurrentBar, 0, highChannel, lowChannel, channelColor, channelColor, 50);


i dont know what wrong... Maybe someone get some tipps.

[Lopat]

[NinjaTrader_Emily]

Hello Lopat,

Thank you for your post.

I suggest adding some print statements for your math to make sure the values are calculated as expected, as well as some prints of the values for highChannel[0] and lowChannel[0] to verify that each series is holding the expected values. Each added plot will add a Series<double> to the Values collection, so you will want to double-check that you are assigning the plot values to the appropriate series. For more informaiotn:

• AddPlot() - https://ninjatrader.com/support/help...t8/addplot.htm
• Values - https://ninjatrader.com/support/help...nt8/values.htm
• Using prints to debug your script - https://ninjatrader.com/support/foru...ing#post791121

Please let me know if I may be of further assistance.

[Lopat]

Thanks. I did some adjustment. Now i get the following Error:

Error on calling 'OnBarUpdate' method on bar 0: 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.

Somebody know how to solve this`?

[NinjaTrader_Emily]

Hello Lopat,

Thank you for your reply.

Based on that error message, you will likely need to add a check to make sure you have enough bars available before your script accesses the series. We have more information about this on the following help guide page:

https://ninjatrader.com/support/helpGuides/nt8/make_sure_you_have_enough_bars.htm

Please let me know if I may be of further assistance.