Smart position sizing & risk management

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Risk Management

Position Sizing

Determining how many shares to buy based on your account size, risk tolerance, and stop loss distance.

What is Position Sizing?

Position sizing determines how many shares (or contracts) to trade based on your account size and the risk per trade. It's the most important concept in risk management.

The formula

Position Size = (Account × Risk %) / (Entry - Stop Loss)

Example: $25,000 account, 1% risk ($250), entry at $50, stop at $48 (risk $2 per share) = 125 shares.

Rules of thumb

  • 1-2% risk per trade: the standard for active traders
  • Never more than 5%: even aggressive traders cap single-trade risk
  • Adjust for volatility: smaller positions on volatile stocks, larger on stable ones
This is exactly what RiskPicks calculates for you: enter your bankroll, risk percentage, and stop loss to get your position size instantly.
Try it in the Calculator

Related Terms

ATR

Average True Range: measures volatility by averaging the true range over a set period (typically 14 days).

Bag Holder

A trader or investor stuck holding shares of a stock that has dropped significantly below their purchase price, often hoping for a recovery that may never come.

FOMO

Fear of missing out. The emotional impulse to chase a stock that is already running because you are afraid of missing the move, often leading to buying at or near the top.

Max Drawdown

The largest peak-to-trough decline in account value. Measures the worst-case loss experienced.

Risk/Reward Ratio

The ratio of potential loss to potential gain on a trade. A 1:3 ratio means risking $1 to potentially make $3.

Stop Loss

An order to sell a position when it reaches a specified price, limiting potential losses.