NT 8 ChartControl object error in Strategy Analyzer...

[funk101]

I'm getting this error whence running the Strategy Analyzer *only*:

Strategy 'SysV4': Error on calling 'OnBarUpdate' method on bar 20: Object reference not set to an instance of an object.

Running the strategy otherwise works fine, *only when doing backtesting in Strategy Analyzer* do I get this message.

Here's my code which on a UniRenko chart, is grabbing the *reversal* value:

protected override void OnBarUpdate()
{
			if (CurrentBar < BarsRequiredToTrade)
				return;
                       double reversal = (ChartControl.BarsPeriod.Value2 * TickSize) * 100;
}

[NinjaTrader_ZacharyG]

Hello funk101,

Thank you for writing in.

You'll want to use just BarsPeriod rather than ChartControl.BarsPeriod: http://ninjatrader.com/support/helpG...barsperiod.htm

The reason for that error is due to ChartControl being null during the backtest. You can check for this with a simple test here:

if (ChartControl == null)
     Print("ChartControl is null " + Time[0]);
else
     Print("ChartControl is not null " + Time[0]);

ChartControl remains null on every call of OnBarUpdate() during the backtest.

Using just BarsPeriod, and not grabbing BarsPeriod from ChartControl, will get around this.

Please, let us know if we may be of further assistance.

[funk101]

Thanks, that did it.