What is a good model?

Summary

• The post discusses the criteria for a robust algorithmic trading model: it must survive any market period from the last 6–7 years without catastrophic drawdowns (e.g., 50% DD or account blow-up) even if not always profitable.
• The author’s thesis is that survival (minimizing tail risk) is the minimum requirement, using Jan 2020 to present as a brutal stress test.
• Quality assessment: This is a general philosophical/methodological discussion about model validation, not specific DD or research. It’s reasonable opinion but lacks data or actionable details.