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Apex Prop
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Position sizing for a rules-based evaluation

Turning a loss limit into a per-trade risk budget you can actually execute. · 5 min read

A common approach is to risk a small, fixed fraction of the remaining daily buffer on each idea. That keeps a losing streak from ending the evaluation in a single session.

From dollars to contracts

Risk per trade ÷ (stop distance × instrument multiplier) gives a maximum position size. Round down to the instrument’s quantity step.

  • ES: $50 per point per contract.
  • NQ: $20 per point per contract.
  • EURUSD: $10 per pip per standard lot (100,000 units).

Educational content only. Not investment advice.