Trade Thesis
A trade thesis is the reason you expect a trade to work, written down before you enter it, together with what would prove it wrong.
A trade thesis is the reason you expect a trade to work, written down before you enter. It also says what would prove you wrong. Writing it helps you judge trades on reasoning, not just results.
- Category
- Trading Strategies
- Reading time
- 3 min
- Also called
- Trade idea, Trade rationale, Investment thesis
- Updated
A trade thesis in plain words
For every trade, write down why you're entering, where your stop is and where you'll take profit.1
Recording the reasoning as well as the result lets you tell good decisions that lost from bad decisions that got lucky.2
A strategy is a repeatable method that tends to work over many trades.3
How to write a trade thesis
State the idea
Write one sentence on why price should move.
Name the evidence
List the Trade Setup and Entry Trigger and data behind it.
Define invalidation
Say what would prove you wrong and set the Stop Loss there.
Set the plan
Note your entry reason, stop and target.1
Check the fit
Make sure it matches your Trading Plan.
Review after
After the trade, log both the reasoning and the outcome so you can separate sound decisions from lucky ones.2
Worked examples
Example 1 — Thesis confirmed
Sound and rightA hypothetical trader expects a share to rise on strong demand and it does.
| Risk | 1R |
| Result | +2R |
With the reasoning on record, it's clear the gain came from following the plan.2
Example 2 — Sound but wrong
Sound, unluckyA hypothetical trader's well-reasoned idea hits the stop.
| Risk | 1R |
| Result | −1R |
Some decisions were sound but unsuccessful; the review keeps the method rather than abandoning it.2
Example 3 — Lucky win
LuckyA hypothetical trader buys on a whim and gains.
| Written reason | None |
| Result | +1R |
Some decisions were flawed but happened to work; without a thesis this win teaches little.2
Trade thesis vs trading plan
| Aspect | Trade thesis | Trading plan |
|---|---|---|
| Scope | One trade | All trading |
| When written | Before each trade | In advance, updated rarely |
| Contents | Reason and invalidation | Rules, risk limits and process |
| Review | After each trade | Periodically |
Where a trade thesis helps
Before entry
Checking the Trade Setup and Entry Trigger is real.
Journal reviews
Logging reasons in a Trading Journal.
Discipline
Supporting Trading Discipline when trades move.
Exit decisions
Guiding Trade Management.
Advantages and disadvantages
Advantages
- Clarifies why you are trading.
- Sets a clear invalidation point.
- Improves trade reviews.
- Reduces impulsive entries.
Disadvantages
- Takes time to write.
- Can create false confidence.
- May be ignored under pressure.
- A good thesis can still lose.
Going deeper
Read as far as you need. Each level builds on the one before it.
What it is
Beginner
A thesis is simply: why in, where wrong, where out.1
Process over outcome
Intermediate
Logging reasons alongside results separates unlucky good decisions from lucky bad ones.2
Building a method
Advanced
Over time, repeated theses turn into a strategy — a method that tends to work across many trades.3
Common mistakes
Writing it after entry
Hindsight bias creeps in.
No invalidation
You never know when you are wrong.
Vague reasons
'It looks good' is not a thesis.
Judging only by result
Good reasoning can still lose.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- A trade thesis is your written reason for a trade.
- It says what would prove it wrong.
- Write it before entering.
- Review it after the trade.
- Judge reasoning, not just results.
Frequently asked questions
How long should a thesis be?
What if the thesis breaks before the stop?
Do professionals write theses?
Further learning
- Trading Plan
The wider rule set.
- Trading Journal
Where theses are recorded.
- Trade Setup and Entry Trigger
Evidence for a thesis.
- Trading Edge
What good theses build.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- IG. Building consistent trading habits (opens in a new tab) Checked .
- CMC Markets. Trading Journals: The Missing Link in the Trading Process (opens in a new tab) Checked .
- CMC Markets. How to develop a trading edge in 9 steps (opens in a new tab) Checked .
Educational content, not financial advice. Examples use hypothetical prices and simplified costs; actual fees, margin rules and regulations vary by broker, market and country. We are not affiliated with any publisher linked above. Last reviewed . Report an error or request a source credit.