Trading Journal

Single highest-return activity after the trade itself. Journal reveals patterns like 'I take B-grade setups on Fridays' or 'I size up after a winner'. Trades in isolation teach nothing; trades as a dataset teach everything. ### Memory is edited by outcome You do not remember your trades. You remember your *results*, and then you reverse-engineer a story that makes the result make sense. A winner becomes evidence of skill. A loser becomes bad luck. Neither memory tells you what you actually did. A journal is the only thing in your trading that cannot flatter you. ### The pattern you cannot see from the inside The classic demonstration is Terrance Odean's 1998 *Journal of Finance* paper, "Are Investors Reluctant to Realize Their Losses?", which examined 10,000 accounts at a large discount brokerage from 1987 to 1993. Investors realised **14.8%** of the gains available to them, but only **9.8%** of the losses available to them (PGR 0.148 versus PLR 0.098). In plain terms: they cashed winners and clung to losers. The one month the pattern flipped was December, when the tax year finally gave them a reason to face the losers. And it did not pay. The winners they sold went on to outperform the losers they kept holding by **3.4%** over the following year ([Odean 1998](https://onlinelibrary.wiley.com/doi/abs/10.1111/0022-1082.00072)). That is the *disposition effect*. It is invisible inside any single trade, which is exactly why it took a dataset to find it, and why it is unlikely you would notice your own version from memory. Your version is smaller and more personal. It is still invisible until you have rows to sort. ### Fields that earn their keep - Date, time, session - Setup name, and its grade against your plan (A/B/C) - **Did I follow the plan? Yes or No.** This is the single most valuable column - Risk in R, and result in R - Emotional state before entry, in three words or fewer - One line: what would I do differently ### How to actually use it Once a week, sort by the adherence column and compare the two groups. Put the expectancy of your on-plan trades next to the expectancy of your off-plan trades. That one comparison tells you whether you are looking at an edge problem or an adherence problem, and those need completely different fixes. ### The common mistake Journaling only the losers. Off-plan *winners* are the more dangerous entry, because the market just paid you for breaking a rule, and that is how a leak gets reinforced instead of found. Log the rule-breaking win with the same honesty as the blown stop. Our Module 10 covers this deeply.