Maetis
Trading
Trading Psychology · Unit 4

Building a Trading Plan

13 min read

1

Hook

I don't need to be fearless in the market — I need a plan I trust, written before the moment I'm tempted to break it.

2

Learning Objectives

  • Explain why a trading plan must be specific enough to say no to a tempting trade, rather than a vague intention.
  • Identify the four concrete components every trading plan must include: entry criteria, position size, stop-loss, and minimum risk-reward.
  • Draft a first written trading plan using these four components, treating it as a living document to review rather than a one-time task.
3

Core Concept

You've already learned the pieces — risk, position sizing, discipline. But pieces sitting loose in your head don't help you at 11:47 AM when a stock is spiking and your hands are already moving toward the buy button. That's the moment a trading plan is for.

A trading plan is simply a written agreement your calm self makes with your tempted self, covering four decisions: entry criteria (what exact condition must happen before you get in), position size (how much money you're putting at risk on this one trade), stop-loss (the exact price where you get out if you're wrong), and risk-reward ratio (the minimum reward you need before the risk is even worth taking). These four cover every real decision a trade forces you to make — when, how much, when to admit you're wrong, and whether it's worth doing at all.

That specificity is the whole point of writing it down.

Here's the part that actually matters: a plan only works if it's specific enough to say no. "I'll enter when it looks strong" is not a rule — it can mean anything, in any mood, on any day. "I'll enter only when price breaks above yesterday's high on above-average volume" is a rule — it either happened or it didn't, and your feelings don't get a vote.

That specificity is the whole point of writing it down.

Once it's written and specific, the plan does its real job: it takes decisions away from the version of you that's excited, scared, or impatient, and hands them to the version of you that was calm enough to think it through in advance. And one more thing worth knowing — this document isn't carved in stone. You review and adjust it later, in calm moments, the same way you wrote it. What you don't do is rewrite it mid-trade because a feeling talked you into it. The plan doesn't predict what the market will do next — no plan can. It only controls what you do, which is the one part of trading actually in your hands.

4

Visual Understanding

Entry Criteria
Position Size
Stop-Loss
Minimum Risk-Reward

Four blocks, filled in before you place the trade — not after.

5

Real-life Example

Before the market opens, Rohan sits at his kitchen table with a plain notebook and writes four lines, nothing fancy:

"Entry — I only enter when price breaks above yesterday's high on above-average volume. Position size — I risk no more than 1% of my total trading capital on this trade. Stop-loss — I exit immediately if price falls 2% below my entry. No exceptions. Minimum risk-reward — I only take the trade if my target profit is at least 2:1 against what I'm risking."

That's it. Four lines, each one answering a decision he won't have to make later while emotional.

By 1 PM, a stock he's been watching jumps 8% on some breaking news. His pulse picks up. Everyone in his trading group chat is talking about it. The old version of Rohan would already be typing in the order. But he checks the price against yesterday's high on the chart — it hasn't broken above it on strong volume yet. His entry rule says no.

So he doesn't buy. Not because he's sure the stock will fall, and not because he's being fearless or brave — he simply follows the rule his calm morning-self wrote for exactly this moment. The rule made the call. His excitement didn't get a vote.

Point: Each of the four blocks answers one specific decision in advance, so when temptation arrives mid-day, the rule — not the emotion — makes the call.

6

Common Mistakes

  • Thinking a trading plan predicts what the market will do next. — In everyday language, 'planning' usually means forecasting an outcome, so learners assume a trading plan should tell them where the price is headed. Fix: Remember a trading plan controls your own behavior and risk, not the market. It says nothing about what will happen — only what you'll do in each situation.
  • Treating a general intention like 'I'll manage risk carefully' as if it were a real plan. — It feels responsible to say, and it's much easier than sitting down and writing exact numbers and conditions. Fix: Test it: could this sentence say no to a tempting trade? If it's vague enough to justify almost any decision, it isn't a plan yet — rewrite it with exact numbers and conditions.
  • Believing a written plan should never be changed once it exists. — Learners confuse discipline (not breaking the plan mid-trade because of emotion) with rigidity (never updating the plan itself over time). Fix: Review and refine your plan periodically, in calm moments, just like you wrote it. Just never rewrite it in the middle of a trade because a feeling is pulling at you.
7

Key Takeaways

  • A trading plan covers four specific decisions: entry criteria, position size, stop-loss, and minimum risk-reward.
  • A plan only has power if it's specific enough to say no to a tempting trade — vague intentions bend under pressure.
  • The plan is written by your calm self in advance, so your tempted self doesn't have to decide anything in the heat of the moment.
  • A trading plan controls your behavior and risk — it does not predict the market or guarantee profit.
  • Review and update your plan in calm moments over time; never break it mid-trade because of emotion.
8

Quiz

Q1. Which four things must a written trading plan cover?

  • Entry criteria, position size, stop-loss, minimum risk-reward
  • Company name, entry price, broker fees, tax rate
  • Market mood, news headlines, tips from friends, entry price
  • Stop-loss, broker name, holding period, dividend yield Answer: Entry criteria, position size, stop-loss, minimum risk-reward — A real trading plan answers four decisions in advance: when to enter, how much to risk, where to exit if wrong, and the minimum reward needed to make the risk worthwhile.

Q2. A trader writes: "I will manage my risk carefully and be sensible with my trades." Why does this NOT count as a real trading plan?

  • It is too specific and leaves no room for judgment
  • It is vague enough to justify almost any decision, so it can't say no to a tempting trade
  • It does not mention the stock's name
  • It is written down instead of just remembered Answer: It is vague enough to justify almost any decision, so it can't say no to a tempting trade — A plan only has power if it's specific enough to say no in the moment. Vague intentions can be stretched to justify whatever the trader already feels like doing, so they bend under pressure.

Q3. A trading plan tells you exactly what price the market will hit next. Answer: False — A trading plan controls your own behavior and risk — it says nothing about where the market will actually go. No plan can predict the market with certainty.

Q4. Priya writes this plan: "Entry — enter when a stock breaks above its 30-day high on strong volume. Size — risk 1% of capital per trade. Stop-loss — exit if price drops 3% below entry. Reward — only take trades with at least 2:1 reward-to-risk." One afternoon, a stock she likes jumps 10% on rumors, but it hasn't broken its 30-day high yet. What should Priya do, based on her own plan?

  • Buy anyway, since a 10% jump is too good to miss
  • Wait, since her entry rule hasn't been met yet
  • Buy a smaller size than 1% to reduce risk while still catching the move
  • Change her entry rule right now so this trade qualifies Answer: Wait, since her entry rule hasn't been met yet — Her written entry rule requires a break above the 30-day high on strong volume. Since that hasn't happened, her plan says no — even though the price move feels exciting. The rule, not the excitement, makes the call.

Q5. Mid-trade, a stock moves against a trader's position. She decides on the spot: "I've learned a lot since I wrote this plan, let me update my stop-loss rule right now." Is updating the plan mid-trade, based on new skill, a wise move? Reveal: Weak: yes, if she's gotten better, updating now makes sense. Strong: a trading plan is reviewed and refined in calm moments between trades — changing it mid-trade under the pressure of an open position is exactly the one thing that should never happen, regardless of how justified it feels.

9

Curiosity Bridge

A plan is only as good as the moment it's tested in — the real question waiting for you is not whether you can write good rules when calm, but whether you'll still trust them when the market makes you want to break them.

This week, try: Before your next trade, write down your four rules — entry, size, stop-loss, and reward — in one place, even if it's just a few lines in your notes app or a notebook, and check your trade against them before you place it. (Right now, text yourself (or write on a sticky note) the four words: Entry, Size, Stop, Reward — so the next time you're tempted to jump into a trade, that message is sitting there waiting for you to fill in the blanks before you act.)

If you had to trade tomorrow morning, could you write down your entry, size, stop-loss, and reward rule right now — or would you decide those things in the moment? Yes/No

(Yes/No with optional one-line explanation)

Price is what you pay; value is what you get.
Benjamin Graham