barsAgo issue when accessing indicator

[MiCe1999]

I just added indicator to my strategy, attached, and I'm getting barsAgo errors. I cannot figure out what the issue is and AI is of no help either. To trigger the error, click Robot:OFF button, then click on T3 Trail: ON button. Exception details are in the output:

Robot enabled. Stop order management activated.
Attempting to toggle trailing stop. CurrentBar: 51701, BarsInProgress: 0, Count: 51703, T3Period: 20
T3 indicator values count: 51703
Error in TrailingStopClick: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
Stack Trace: at System.ThrowHelper.ThrowArgumentOutOfRangeExceptio n(ExceptionArgument argument, ExceptionResource resource)
at NinjaTrader.NinjaScript.Series`1.IsValidDataPoint( Int32 barsAgo)
at NinjaTrader.NinjaScript.NinjaScriptBase.IsValidDat aPoint(Int32 barsAgo)
at NinjaTrader.NinjaScript.Strategies.StopEntryRobotT 3.TrailingStopClick(Object sender, RoutedEventArgs e) in xxx.cs:line 350

[NinjaTrader_Gaby]

Hello MiCe1999,

Thank you for your post.

This message is indicating the specific index requested from a collection does not exist. Indexes must be a non-negative number and less than the size of the collection. The error may be indicating the index requested is larger than the number of elements in the collection.

In the case of barsAgo values with Series, any barsAgo index must be less than CurrentBar (the total number of bars is the size of a Series collection).

// require BarsInProgress 0 to have 3 bars processed, require BarsInProgress 1 to have 4 bars processed
if (CurrentBars[0] < 3 || CurrentBars[1] < 4)
return;

Print(Times[0][3]); // this does not cause an error as CurrentBars[0] is equal to or greater than 3

Print(Times[1][4]); // this does not cause an error as CurrentBars[1] is equal to or greater than 4

Print(Times[0][5]); // this line of code will cause an invalid index error. When CurrentBars[0] is 4 there is no bar 5 bars ago

The help guide discusses ‘Make sure you have enough bars in the data series you are accessing’ .
NinjaScript > Educational Resources > Tips > Make sure you have enough bars in the data series you are accessing


You'll need to debug the script using prints to determine which line of code in particular is hitting the indexing error. Once you identify which line is getting the error, you can further debug by printing out the size of the collection being accessed along with the index you are trying to access.

https://support.ninjatrader.com/s/ar...nd-TraceOrders