Position Sizing From a Stop Loss: A Worked Risk Example
A simple calculation connects account risk, entry price and stop distance without promising a winning trading strategy.
Suppose a hypothetical trader has a $5,000 account and chooses a $25 maximum planned loss on one position. That is 0.5% of the account. If the intended stop is $2 per unit away from entry, the theoretical position size is 12.5 units before fees and slippage. Actual instruments may require whole units or have contract multipliers.
The stop price is a planned exit trigger, not a guarantee of execution at the chosen level. During gaps, thin liquidity or volatile announcements, an order may fill worse than expected. Spreads, commissions and financing charges should be included when calculating the risk budget. Leveraged instruments can also change margin requirements.
This numerical example is not personalized advice or an instruction to risk a particular percentage. A trader should verify contract specifications and possible loss scenarios using the broker's documentation. Starting with loss tolerance and realistic execution costs is more defensible than selecting maximum volume first.
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