Position size calculator
The single most important risk control: never risk more than a fixed % of your account on one trade. Enter your numbers below — the size updates instantly.
- Risk amount
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- Position size
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- Position value
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How it works
Position sizing works backwards from the loss you're willing to take, not the profit you hope for:
- · Risk amount = Account balance × Risk % — the most you'll lose if the stop hits.
- · Risk per unit = |Entry − Stop| — the loss on a single share/contract.
- · Position size = Risk amount ÷ Risk per unit.
For futures or forex, multiply the price distance by the instrument's tick/pip value to get the per-contract risk. Keeping risk fixed at 1–2% is what stops one bad trade from erasing ten good ones — and it's exactly the kind of rule Shibiki enforces at your broker.
FAQ
What risk % should I use per trade?
Most disciplined traders risk 0.5–2% of the account per trade. On a prop-firm evaluation with a tight daily loss limit, staying near the low end keeps a losing streak from breaching the rule.
Does this work for futures and forex?
The logic is identical; you convert the entry–stop distance into money using the contract's tick value (futures) or pip value (forex), then divide your risk amount by it.
Related: prop-firm drawdown · expectancy / R