Well, first of let me apologize in advance if this question has been asked and I was unable to find the answer by myself.
I came across some (not so) old post, claiming that it was possible to use Lean standalone, without even evoking lean init and logging into QuantConnect via CLI.
However, I am not sure if this is still the case.
Can you please tell me if I can indeed use Lean without QuantConnect and, if so, could you point me to a minimal example, that uses CSV OHLCV data?