Position sizing converts a chosen account-risk amount into an appropriate trade size based on the distance to the stop.
A common framework is: account risk amount ÷ stop distance = position exposure per unit of price movement. The exact calculation depends on the instrument.
How it works
- 1. Choose the percentage or amount of account equity you are willing to risk.
- 2. Calculate that amount in account currency.
- 3. Measure the entry-to-stop distance.
- 4. Translate the risk amount and stop distance into position size.
- 5. Round down when an instrument has a minimum or step size.
What matters most
- Risk percentage should reflect the volatility and strategy.
- A wider stop generally requires a smaller position for the same monetary risk.
- Leverage changes margin required, not the amount the market can move against the position.
- Minimum order sizes can make very small-account risk targets impractical.
Practical example
On a $1,000 account, 1% risk equals $10. If the setup would lose $2 for each unit traded at the stop, the theoretical size would be five units before considering instrument-specific contract rules.
Common mistakes to avoid
- Sizing from desired profit instead of maximum acceptable loss.
- Confusing margin with risk.
- Rounding a position upward when that breaks the risk limit.
- Ignoring existing open-position exposure.
Using this on Chaintreda
CTmarketer includes a simple position-size estimator. Chaintreda then shows the live market and account context needed before any actual position is submitted.
Use the position-size calculator →
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Frequently asked questions
Is leverage the same as position size?
No. Position size is market exposure; leverage affects how much margin may be required to hold that exposure.
Should position size stay constant?
Not necessarily. If stop distance or account equity changes, a risk-based position size will usually change too.
Why round down?
Rounding down helps keep actual risk from exceeding the intended maximum when an instrument only supports discrete size increments.
Continue learning
Risk note: This material is educational and does not constitute investment advice. Trading and digital-asset activity can result in losses. Use appropriate risk controls and only commit funds you can afford to lose.