Error 920, 921 or 923. What does this mean?

These errors occur when it is not possible to read an indicator's value. This is usually due to an error in configuration (see indicators parameters), but could also indicate that the indicator is not compatible with the NNFX Algo Tester.

• First, check that the indicator is correctly installed on your MT4. If so, you can see it in the MT4 Navigator tab (CTRL+N) in the "Indicators" section.
  
  
• Also, check that the indicator name in the configuration is correct. If not, you will get the error "Cannot open file" on your Journal tab.
  
  
• Check that the indicator works on a chart when configured with the inputs you want to use, and confirm that there is sufficient data needed for the indicator to work (some indicators require more than one year of historical data, or roughly 250 candles).
  
  
• If you are using custom indicators, check that the choice of buffers is correct.