Quick checklist

  • Close unrelated workspaces before importing a new indicator.
  • Use NinjaTrader's import menu instead of extracting files manually.
  • Read compile errors carefully; they often identify duplicate names or missing dependencies.
  • Test the imported indicator on a blank chart before loading it into an active workspace.

Import flow

Open NinjaTrader, choose Tools > Import > NinjaScript Add-On, select the ZIP file, and let NinjaTrader compile the package. If the import fails, save the exact error text before trying another fix.

Clean-chart test

After import, create a simple chart with a common instrument and timeframe. Add the indicator by itself, confirm it plots, then adjust settings one at a time.

When an import fails

Common causes include duplicate indicator class names, old generated cache sections, missing referenced assemblies, or code written for a different NinjaTrader major version.