Risk Management · Sizing Risk Deliberately
Position Sizing From Risk, Not From Excitement
What You'll Learn
- How to connect risk per trade to an actual position size
- Why this approach differs from sizing a position based on conviction alone
- A simple way to think through the calculation conceptually
The Big Idea
Rather than deciding position size, from Trading Fundamentals, based on how confident or excited you feel about a trade, let me show you a better order: start from your risk per trade, then work backward to the position size that actually matches it.
Let's Break It Down
The starting inputs are your risk per trade, from the last lesson, and the distance between your planned entry price and your planned stop-loss level, from the stop order concept in Trading Fundamentals — how far price would need to move against you before your stop is triggered.
Here is the core idea: a wider distance between entry and stop means each unit of the asset represents more risk if the stop is hit, which calls for a smaller position size to keep the total risk at your predetermined amount. A tighter stop distance allows for a proportionally larger position size, while still risking the same predetermined amount overall.
I want you to see that this approach deliberately separates position sizing from how confident or excited you feel about a specific trade idea, echoing the position-size lesson in Trading Fundamentals. Two trades you feel very differently about should still often use a similar risk-per-trade approach. Conviction affects whether you take a trade at all — not how much of your predetermined risk budget any single trade is allowed to consume.
Real Example
A demolition crew does not decide how much explosive to use based on how excited they are about a particular building. They calculate the exact amount needed based on the specific structure and the precise, intended outcome. Position sizing from risk works the same way: it is a calculation based on the specific setup, not a feeling.
Why It Matters
This lesson connects risk per trade directly to a practical, repeatable position-sizing process. It turns the abstract idea of "deciding risk in advance" into an actual, concrete number you can use every time you are about to enter a trade.
Common Mistake
Please do not size a position larger just because a particular trade idea feels unusually compelling. Feeling more confident about a trade does not change how much of your predetermined risk-per-trade budget it should be allowed to consume. Conviction and risk sizing are separate decisions.
Quick Check
In this risk-based approach, what determines position size?
Key Takeaways
- Position size can be calculated backward from your risk per trade and the distance to your planned stop-loss.
- A wider stop distance calls for a smaller position size to keep total risk consistent; a tighter stop allows a larger one.
- This deliberately separates position sizing from conviction — how confident you feel doesn't change your risk budget for a single trade.
Finished reading?
Mark this lesson as complete to track your progress.