Orders & execution · Intermediate

Position Sizing Basics

A 1-minute lesson from the MarketPro academy, one of 16 in orders and execution.

Last reviewed by the MarketPro research desk · Editorial policy

Short answer

Position sizing refers to deciding how much capital to allocate to a single trade or investment. It is one of the most important risk-management decisions a trader makes, often more consequential than the choice of which stock to trade.

Position sizing refers to deciding how much capital to allocate to a single trade or investment. It is one of the most important risk-management decisions a trader makes, often more consequential than the choice of which stock to trade.

Why Position Size Matters

  • Even a well-considered trade can result in a loss, so the size of any single position determines how much that loss affects the overall account.
  • Consistently oversized positions can lead to large drawdowns from just a few unfavorable trades in a row.
  • Appropriately sized positions allow a trader to remain in the market and apply their approach across many trades, rather than risking a large setback from one outcome.

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Not investment advice. Past performance is not indicative of future results.

Run the numbers while this is fresh

The arithmetic in this category has a free calculator on this site, no sign-up and nothing leaves your browser: Position size calculator, Margin calculator, Leverage calculator.

Written and reviewed by the MarketPro research desk

MarketPro is a trading-signal and trading-education app operated by Harajuku Holdings LTD (Cyprus). Our signal desk publishes and tracks every trade idea in-app, and every page here is checked against the app's live behaviour before publishing. Last reviewed . How we produce signals and content · About MarketPro

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Not investment advice. Past performance is not indicative of future results.