DrawLine error startBarsAgo out of Range

[GKonheiser]

Im getting out of range error for a DrawLine and Im not sure why.

here is the error,


Error on calling 'OnBarUpdate' method for strategy 'MyCustomStrategy/16e4ec3489ac4e47a5dff5ac3572ba30': MyCustomStrategy.DrawLine: startBarsAgo out of valid range 0 through 250, was 418.

Here is the code,

#region Using declarations
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Xml.Serialization;
using NinjaTrader.Cbi;
using NinjaTrader.Data;
using NinjaTrader.Indicator;
using NinjaTrader.Gui.Chart;
using NinjaTrader.Strategy;
#endregion

// This namespace holds all strategies and is required. Do not change it.
namespace NinjaTrader.Strategy
{
/// <summary>
/// Enter the description of your strategy here
/// </summary>
[Description("Enter the description of your strategy here")]
public class MyCustomStrategy : Strategy
{
private double highY;
private double lowY;
private double closeY;
private int sessionCount;


protected override void Initialize()
{
Add(PeriodType.Minute, 60);
Add(PeriodType.Minute, 1);

CalculateOnBarClose = true;

}

/// <summary>
/// Called on each bar update event (incoming tick)
/// </summary>
protected override void OnBarUpdate()
{

DrawLine("highY" + sessionCount, false, Bars.BarsSinceSession, highY, 0, highY,Color.Black,DashStyle.Dash,2);
DrawLine("lowY" + sessionCount, false, Bars.BarsSinceSession, lowY, 0, lowY,Color.Black,DashStyle.Dash,2);
DrawLine("closeY"+ sessionCount, false, Bars.BarsSinceSession, closeY, 0, closeY,Color.Black,DashStyle.Dash,2);

if(BarsInProgress == 1)
return;

// If there is a new session add one to session count.
if(Bars.SessionBreak)
sessionCount++;

if(BarsInProgress == 2)
{
if(CurrentBar < 1)
return;

if(Bars.FirstBarOfSession)
{
highY = MAX(Highs[1],14)[0];
lowY = MIN(Lows[1],14)[0];
closeY = Closes[1][1];
}



}

}


}
}

[NinjaTrader_CalH]

Hi Gkonheiser,

Since you are using a multi series script you will need to have a BarsInProgress check for the DrawLines().

Let me know if this is the answer you are looking for.

[GKonheiser]

Hi Cal

I moved the DrawLines under if(BarsInProgress == 2) but still have the error so thats probably what you mean. Could you explain further ?

[NinjaTrader_CalH]

GKhonsier,

Try changing the BarsRequired to infinite when you apply strategy to the chart.

If this does not resolve the issue the script will need to be debugged

[GKonheiser]

hi Cal

I found the problem. I am using DrawLine on a minute time frame which means I have 840 bars in one session and apparently the startBarsAgo range is 0 to 250. Is there a way to increase this limit or how would you get around this limit on a minute chart?

[NinjaTrader_CalH]

GKonheiser,

Yes, you would need to change the Maximum Bars Look Back to infinite.
You can do this through the script parameters when adding it to a chart or in the code via the Initialize section -
http://www.ninjatrader.com/support/h...rslookback.htm