NT8B10: 'barsAgo' needed to be between 0 and -1 but was 0

[engrvivs]

Hi

When testing a strategy in Strategy Analyzer, following error is reported:
'barsAgo' needed to be between 0 and -1 but was 0

This happens while comparing current [0] and previous [1] values of a public series, that is evaluated in other custom indicator.

I have tried changing MaximumBarsLookBack to Infinite (in both the strategy and the indicator), but to no avail.

Is there some way out?

Kind Regards
Vivek

[NinjaTrader_ChelseaB]

Hello Vivek,

When calling 1 bar ago, are you ensuring there is at least 1 bar previous?

Do you have any check such as 'if (CurrentBar < 1) return;' ?

[engrvivs]

Yes Chelsea,

if (CurrentBar < 30) return;
exists within OnBarUpdate() of the strategy, before it calls the indicator.

[NinjaTrader_ChelseaB]

Hello engrvivs,

May I test your script.

If so, please attach an export to your next post.
To export a NinjaTrader 8 NinjaScript do the following:

1. Click Tools -> Export -> NinjaScript...
2. Click the 'add' link -> check the box(es) for the script(s) you want to include
3. Click the 'Export' button
4. Enter a unique name for the file in the value for 'File name:'
5. Choose a save location -> click Save
6. Click OK to clear the export location message

By default your exported file will be in the following location:

• (My) Documents/NinjaTrader 8/bin/Custom/ExportNinjaScript/<export_file_name.zip>

Below is a link to the help guide on Exporting NinjaScripts.

http://www.ninjatrader.com/support/helpGuides/nt7/export.htm

If you want to keep the script private, please send an email to platformsupport [at] ninjatrader [dot] com. In the email include a link to this forum thread.

[olafR]

Hi Chelsea,
I'm having the same issue getting the barsAgo error with NT8 what works ok with NT7.
It's a NT7 indicator I did convert to run with NT8 and now producing that error.
The bars lookback logic hasn't change between the NT7 version and NT8, the only changes I made are concerning the drawing and that shouldn’t cause any concerns for NT8.
May I send you the script to have a look ?



thanks and regards,
Olaf

[NinjaTrader_ChelseaB]

Hello Olaf,

I have received your email in platform support and I am happy to take a look.

I'll be working with you in email moving forward.