Array dimensions exceeded supported range

[Lance El Camino]

I have an indicator that uses 4 additional secondary series of the primary instrument for MTF purposes. It works fine on a chart but when I try to add it to a strategy I get the error: Array dimensions exceeded supported range. The error goes away when I reduce the number of days to backtest. Any ideas on what causes this?

[NinjaTrader_ChelseaB]

Hello Lance El Camino,

Is there other code in the script?

Could the script be calling a Draw method with a negative barsAgo value or barsAgo value that is greater than CurrentBar or outside of BarsInProgress 0?

Is there proper checking in the code that CurrentBars[barsInProgressIndex] is greater than any barsAgo values for the Series of that BarsInProgress?

https://ninjatrader.com/support/help...inprogress.htm
https://ninjatrader.com/support/help...urrentbars.htm

Use prints to determine the specific line of code causing the error.
Using Prints and TraceOrders to understand behavior.

What is that specific line causing the error?

[Lance El Camino]

Yes, there are Draw.Rectangle methods where the endBarsAgo value is -100000 so it extends beyond current time. Is there a way to have it keep extending with each new bar that prints?

[NinjaTrader_ChelseaB]

Hello Lance El Camino,

Using negative indexes for barsAgo values is not supported and would be causing that error.

You can use barsAgo 0 to draw to the current bar.

If you are wanting to render to the edge of the chart, you may want to custom render in OnRender() instead of using a Draw method.

[Lance El Camino]

Is that specific to strategy scripts because it works when the indicator is on the chart.

[NinjaTrader_ChelseaB]

Hello Lance El Camino,

This would be unsupported for any script including strategies and indicators, so there would not be any expected behavior.