Using the Coral indicator- VP's Indicator Profile Series (Post 2022-09-20)
I will explain here why there are problems testing this indicator in the NNFX Algo Tester and show the solution, which is quite simple.
When testing this indicator you will get the error "Cannot open file". This is because the name of the indicator causes conflict in the software. "Coral" is one of the Web Colors defined in the MQL4 and the NNFX Algo Tester treats it as such.
All you have to do to backtest the Coral indicator is to rename the indicator file, for example "Coral.mq4" to "Coral-indicator.mq4" (you can use the file below).
This will solve the problem. (If the version you have has another name then you shouldn't have any issues).
To backtest the indicator you can use the following configuration:
SINGLE LINE SIGNAL