The mistakes that matter most
These are not exotic edge cases. They are the recurring patterns that show up when process discipline slips.
- Do not let recent outcomes rewrite your risk standards.
- Do not deploy anything you are not prepared to stop.
- Do not trade a strategy you cannot explain under pressure.
The dataset approved a story the market never did
If the strategy needs too much parameter precision, too many filters, or too much explanation after the fact, the edge is probably not durable enough for capital.
A decent strategy can be ruined by bad sizing
When position size outruns evidence, ordinary drawdowns start forcing emotional decisions, and the system becomes unstable even if the signal logic stays sound.
Unsupervised automation is still a risk choice
Not watching health, execution quality, or regime change is still an active decision. The absence of intervention can itself be the mistake.
Refusing to retire weak logic compounds damage
A strategy that no longer earns desk space should be cut cleanly. Endless rescue attempts usually waste more capital and time than the original loss.