Error when enabling strategy

[bengalvfan]

I am just learning strategy builder and just trying to get my feet wet with a simple strategy but I am getting an error.

I am trying to create a simple strategy that goes long when the current bar crosses above the trendline indicator.

When try and enable the strat I get the following errors:

Strategy 'BuyOnTrendBreak': Error on calling 'OnBarUpdate' method on bar 10: 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.

Indicator 'Trend lines': Error on calling 'OnBarUpdate' method on bar 10: Object reference not set to an instance of an object.

My code after using the strategy builder looks like this:
namespace NinjaTrader.NinjaScript.Strategies
{
public class BuyOnTrendBreak : Strategy
{
private TrendLines TrendLines1;

protected override void OnStateChange()
{
if (State == State.SetDefaults)
{
Description = @"Enter the description for your new custom Strategy here.";
Name = "BuyOnTrendBreak";
Calculate = Calculate.OnPriceChange;
EntriesPerDirection = 1;
EntryHandling = EntryHandling.AllEntries;
IsExitOnSessionCloseStrategy = true;
ExitOnSessionCloseSeconds = 10;
IsFillLimitOnTouch = false;
MaximumBarsLookBack = MaximumBarsLookBack.TwoHundredFiftySix;
OrderFillResolution = OrderFillResolution.Standard;
Slippage = 0;
StartBehavior = StartBehavior.WaitUntilFlat;
TimeInForce = TimeInForce.Gtc;
TraceOrders = false;
RealtimeErrorHandling = RealtimeErrorHandling.IgnoreAllErrors;
StopTargetHandling = StopTargetHandling.PerEntryExecution;
BarsRequiredToTrade = 20;
// Disable this property for performance gains in Strategy Analyzer optimizations
// See the Help Guide for additional information
IsInstantiatedOnEachOptimizationIteration = true;
}
else if (State == State.Configure)
{
}
else if (State == State.DataLoaded)
{
TrendLines1 = TrendLines(Close, 1, 8, 25, false);
SetProfitTarget(CalculationMode.Currency, 155);
SetStopLoss(CalculationMode.Currency, 55);
}
}

protected override void OnBarUpdate()
{
if (BarsInProgress != 0)
return;

if (CurrentBars[0] < 1)
return;

// Set 1
if (CrossAbove(CurrentBars[0], TrendLines1, 1))
{
EnterLong(Convert.ToInt32(250), @"LongTrendBreak");
}

}
}
}

[NinjaTrader_Jim]

Hello bengalvfan,

Thanks for your post.

The TrendLines indicator requires access to ChartControl and would need to be plotted on the chart in order to function. When creating a condition for this indicator, please select Plot On Chart so this indicator can be used in the Strategy Builder.

Please also note that the strategy should be checking if a Price Series is crossing above an indicator plot. For example: Price > Close CrossAbove Trendlines. (Screenshot attached.)

Publicly available resources for using the Strategy Builder can be found below.

Strategy Builder 301 - https://www.youtube.com/watch?v=_KQF2Sv27oE

Conditions exmaples - https://ninjatrader.com/support/help...on_builder.htm

Actions examples - https://ninjatrader.com/support/help...us/actions.htm

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

[bengalvfan]

This helped me out a lot thanks