The Journal: Your Own Backtest

Memory is a liar with a agenda. The journal is the only honest witness you will ever employ.

The five fields (per trade, 60 seconds)

1. Setup:    tier, score, market, direction
2. Plan:     entry, SL, TP1, size, risk$ — as placed
3. Context:  regime, fleet stance, mode (NORMAL/REDUCED)
4. Outcome:  exit price + reason (TP1/trail/SL/manual), PnL
5. Note:     one honest sentence. "Followed plan." or what bent.

Field 5 is the one that compounds. "Moved stop, paid for it." "Skipped checklist, got away with it" — got-away-with-it entries are the most dangerous wins you will ever log.

The monthly read

Once a month, with the book flat, ask the journal three questions:

• Where does PnL actually come from? By tier, by regime, by day type. The answer is usually narrower than you think.
• What do plan-breaks cost? Sum the PnL of every entry where field 5 confessed. That number is your discipline bill.
• What would zero plan-breaks have returned? That is the trader you are paying to not be.

Clean data or no data

One contamination rule: journal entries describe trades that followed the system. Experiments, fat-fingers, and tilt trades get journaled too — but TAGGED, so they never pollute the read on whether the system works for you. A journal mixing system trades with chaos measures neither.