Ch 9 ยท Price Action

Trading Records for Discretionary Traders

How to log a discretionary trade so that six months from now you can review it honestly โ€” the ex-ante vs ex-post distinction, what to record, what to ignore.

๐Ÿ“– 12 min

Discretionary trading without records is guessing. Records without honest reflection are just data. This chapter is the single-highest-leverage habit in retail trading: how to log every trade so that six months from now, your journal produces a better trader than any additional strategy would.

9.1 Two categories of records

Most retail traders keep the first and skip the second. That's why most retail traders don't improve. Skill comes from reviewing the second, not the first.

9.2 What to record at entry (ex-ante)

Written BEFORE the trade executes or immediately upon executing:

๐Ÿ’ก The 'reasoning at entry' rule
This is the discipline that separates skilled discretionary traders from everyone else. Ex-ante reasoning captures your genuine thesis before hindsight bias contaminates it. Reviewed later, it exposes the difference between "I read the market well" and "I got lucky."

9.3 What to record at exit (ex-post)

Written AFTER the trade closes:

9.4 Ex-ante vs ex-post โ€” the critical distinction

The most important distinction in trading records is between:

Both matter. But they matter for different reasons.

Ex-ante shows the quality of your process. If you made a decision that would be correct 70% of the time, and it happened to be one of the 30% failures, that's a good decision with a bad outcome. Ex-ante records let you evaluate the process independently of the outcome. This is the only way to build genuine skill.

Ex-post shows the pattern of outcomes over time. What sets fail, what setups win, what times of day work, what market conditions favour you. This is where statistical edge is measured.

โš ๏ธ The hindsight bias trap
Ex-post narrative naturally contaminates memory. Two months from now, a losing trade will "feel" like it was obviously going to fail. It wasn't โ€” you took it because at the time it looked like a good trade. Ex-ante screenshots and written reasoning are the antidote to this bias. Without them, you keep making the same mistakes because you're convinced you already learned from them.

9.5 The minimal setup โ€” one spreadsheet, one folder

You don't need software. A single Google Sheet + a folder of screenshots is enough:

ColumnContent
DateTrade entry date/time
InstrumentNifty / RELIANCE / etc
SetupPin bar at daily support / Engulfing at VWAP / etc
BiasBullish / Bearish / Neutral
EntryPrice
StopPrice
TargetPrice
R:R(target โˆ’ entry) / (entry โˆ’ stop)
Confidence1โ€“5
Screenshot linkURL to entry chart image
ExitPrice + reason
R resultActual R gained/lost
Notes1โ€“2 sentences on what happened
Lesson tagShort label

Every row is one trade. Every trade takes 5 minutes to log properly. Skip weeks are more expensive than they feel โ€” after 6 weeks of gaps, the journal loses its diagnostic power because the pattern is broken.

9.6 The weekly review โ€” where the compound learning happens

Every Sunday, before market opens Monday:

  1. Filter your journal to the past week's trades
  2. Group by setup type. Compute win rate and average R per setup. Which setup made money? Which lost?
  3. Read the ex-ante notes for the losing trades. What was the process error? Was the setup wrong, the level wrong, the R:R wrong, or the execution wrong?
  4. Read the ex-ante notes for the winners. Was there a lesson tag pattern? Are the winners concentrated in a specific setup, time-of-day, or bias?
  5. Pick ONE thing to focus on next week. One rule to enforce, one setup to skip, one habit to add. Not five things โ€” one
  6. Write that one thing at the top of next week's journal

Compounding this weekly for a year does more for a discretionary trader than any book, course, or indicator can.

Advanced The journal metrics that actually matter
Most journals over-count and under-signal. The four metrics worth tracking, in order of importance: 1. **Expectancy per trade** = (win rate ร— avg winner R) โˆ’ (loss rate ร— avg loser R). Should be > 0.3R for the strategy to be worth trading 2. **Max consecutive losses** โ€” measures whether you can survive a rough patch without breaking discipline. Should be < 5% of account drawdown 3. **Win rate by setup** โ€” reveals which of your setups is actually working. Often you'll discover 2 of 3 setups are profitable and 1 is a break-even; drop the third 4. **Execution deviation** โ€” % of trades where you deviated from the written plan (moved stop, exited early, added size). Should trend toward zero over months Ignore: total P&L for individual weeks. Too noisy. Total P&L for a quarter is a valid but lagging read.

9.7 Expectancy math โ€” the formula everything reduces to

The single equation that determines whether your strategy makes money over the long run:

Expectancy per trade = (Win rate ร— Avg winner R) โˆ’ (Loss rate ร— Avg loser R)

Example โ€” the 1-2-3 pin bar strategy after 50 trades:
  Wins:              28  (56%)
  Losses:            22  (44%)
  Avg winner:        1.8R
  Avg loser:         โˆ’1.0R
  Expectancy = 0.56 ร— 1.8 โˆ’ 0.44 ร— 1.0
             = 1.008 โˆ’ 0.44
             = +0.57R per trade

Meaning: on average, every trade adds 0.57ร— your risk amount to
the account. Trade 100 times at 1% risk = ~57% account growth
before compounding, drawdown, and taxes.

Rules of thumb for interpreting expectancy:

ExpectancyMeaningAction
> +0.5RExcellent edgeScale size cautiously; keep discipline
+0.2 to +0.5RGenuine edgeTrade at 1% risk; refine over months
0 to +0.2RMarginal / possible noiseNeed larger sample (100+ trades) to confirm
NegativeLosing strategyStop trading; redesign one pillar (bias, setup, or exit)

Almost every retail trader who thinks they have an edge is actually running at 0 to โˆ’0.1R expectancy โ€” winning weeks feel like edge, losing weeks feel like bad luck. Journalling 50+ trades and computing this formula honestly separates edge from confirmation bias.

9.8 A sample journal โ€” 20 trades of a Nifty pin bar system

Here's what an actual journal snapshot might look like. Real numbers, hypothetical strategy โ€” the shape is what matters, not the values.

#SetupBiasR:RConfOutcomeR gainedLesson tag
1Pin @ EMA 20Bull2.14Target hit+2.1Clean
2Pin @ prior swingBull2.45Stoppedโˆ’1.0Weak wick, marginal setup
3Pin @ EMA 20Bull1.83Target hit+1.8Skipped confirmation, got lucky
4Pin @ round #Bear3.15Time stopโˆ’0.3Slow to move; time stop worked
5Pin @ EMA 20Bull2.24Target hit+2.2Clean
6Pin @ swingBull2.03Stoppedโˆ’1.0Weak trend read on daily
7Pin @ EMA 20Bear2.55Target hit+2.5Textbook
8Pin @ round #Bull2.04Trailed+1.3Left profit on the table
...(12 more rows omitted)

Analytics from this journal:

Within 20 trades, patterns emerge that were invisible in individual sessions. This is why journals compound.

9.9 The weekly deep-dive โ€” a step-by-step checklist

Every Sunday, block 30 minutes for this exact sequence:

  1. Read every trade's ex-ante note. Do this before looking at outcomes. Ask: "Would I have taken this trade again with the info I had?"
  2. Group by setup type. Compute win rate and expectancy per setup. Which one made money? Which broke even? Which lost?
  3. Group by confidence score. Are high-confidence trades genuinely outperforming low-confidence ones? If not, your scoring rubric is broken
  4. Group by time-of-day (intraday) or day-of-week (swing). Are certain hours / days concentrating losses? Consider filtering them out
  5. Read lesson tags. Which mistake do you keep making? "Moved stop" 3 times in 20 trades = the single thing to fix next week
  6. Compute deviation rate. % of trades where you didn't follow the plan. Target: < 5%. If it's 30%, your strategy isn't real โ€” you're improvising
  7. Pick ONE thing to fix next week. Not five. One rule to enforce, one setup to skip, one habit to add. Write it at the top of next week's journal

The compounding effect of doing this consistently for 6-12 months is what actually separates the surviving 5% of retail traders from everyone else. It's not talent; it's this loop.

9.10 Journal traps โ€” things NOT to do

Advanced Kelly criterion for discretionary traders (with the honest asterisk)
The Kelly formula computes the theoretically-optimal position size given a strategy's win rate and payoff structure:
Kelly % = (Win rate โˆ’ (1 โˆ’ Win rate) / R) ร— 100

Where R = Avg winner / Avg loser (in R units).

Example: Win rate 60%, avg winner 2R, avg loser 1R:
  R = 2 / 1 = 2
  Kelly = (0.60 โˆ’ 0.40 / 2) ร— 100
        = (0.60 โˆ’ 0.20) ร— 100
        = 40% of account per trade
40% risk per trade sounds absurd for a retail trader โ€” and it is. That's because Kelly assumes: 1. Your win rate estimate is exactly right (in practice, retail traders overestimate win rate by 10-15 percentage points) 2. You never break discipline (in practice, all humans do) 3. The strategy's edge is stationary (in practice, edges decay) The practical answer: use fractional Kelly. Divide Kelly% by 4 or 8: - Half-Kelly (รท2): still aggressive; suits confident traders with 200+ journalled trades - Quarter-Kelly (รท4): reasonable for a systematic approach with strong sample - Eighth-Kelly (รท8): what most professional retail traders actually use In the example above, eighth-Kelly = 5% risk per trade. Still meaningfully higher than the 1% textbook rule โ€” Kelly says fixed-1% under-sizes when your edge is genuine. For discretionary traders new to journalling: stick with fixed 1% until you have 100+ trades. THEN compute Kelly, apply eighth-Kelly, and see if the result feels right. Never full-Kelly under any circumstances.