Risk first, size second
A position can fit the broker's margin requirement and still be far too large for your risk tolerance. Separate account risk, stop distance, position size and margin into different decisions.
The four-step sizing logic
- Choose the maximum account amount or percentage you are prepared to lose if the trade fails.
- Define the price distance to the invalidation/stop level.
- Determine the instrument's pip/tick value or contract value for your account currency.
- Calculate position size from those inputs, then separately confirm margin required.
Risk amount
Risk amount is the planned account loss at the stop before slippage and gaps. A fixed percentage can keep sizing proportional as account equity changes, but the appropriate level is a personal decision ESTVELO does not prescribe.
Stop distance
A wider stop requires a smaller position for the same planned monetary risk. Moving the stop but keeping size unchanged changes the actual account risk.
Drawdown compounds
A 10% loss requires an 11.1% gain on the reduced balance to recover; a 50% loss requires a 100% gain. Large drawdowns therefore change the recovery mathematics, not just the emotional difficulty.
Stops are not guaranteed prices
During gaps, fast markets or poor liquidity, a stop can fill away from the requested level. Position sizing should leave room for execution uncertainty rather than assuming the theoretical stop loss is exact.
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Research essentials
Use ESTVELO as a research workspace: verify the source, check the jurisdiction, understand the assumptions and separate market information from a personal trading decision.