After 100 or more trades, compare the two groups:
- What share of trades are a yes.
- Expectancy of the yes trades.
- Expectancy of the no trades, including the ones that won.
The point is that it separates decision quality from outcome. A losing trade I'd take again doesn't need fixing. A winning trade I wouldn't take again is a warning, because it rewards the habit I want to remove.
Filling it in right after closing is a weakness, because the result colours the answer. An alternative is to fill it in at entry, then again after closing, and see how often the opinion changes.
Does anyone use a similar decision-quality column? I'd be interested in how you stop the outcome from leaking into the rating.