Position Sizing for Swing Traders: Rules That Survive Bad Weeks

Most blown accounts are not bad stock picks — they are oversized positions. Swing traders hold through overnight gaps, so a single trade can move more than your planned stop on paper. Position sizing is how you stay in the game when the market opens against you.

Start with risk per trade, not share count

Decide how much of your account you are willing to lose if the stop is hit — typically 0.5% to 2% per trade for most swing accounts. Then work backward from entry to stop distance. Quantity = risk amount ÷ (entry − stop) per share. Log that math before you enter so you are not guessing lot size at the open.

• Set a fixed rupee or dollar risk per trade (e.g. ₹2,000 on a ₹5 lakh account = 0.4%)
• Never increase size after a win to “make more back”
• Reduce size when volatility expands (ATR widens, earnings week)
• Cap total open risk across all Active positions — not just one trade

Account equity vs. notional exposure

Planned risk is what you lose at your stop. Notional exposure is how much capital is tied up while the trade is open. A ₹3 lakh position with a ₹6,000 stop still gaps through that stop on a bad headline. Track both: risk per trade and sum of active notional as a percent of equity.

Rules that compound over time

• Daily loss limit: stop trading after −2R or −3% for the day
• Max concurrent positions: e.g. three swings unless setups are uncorrelated
• No adding to losers — size is fixed at entry
• Scale out partial profits; do not double size on the next trade

Log size in your journal

Record quantity, stop, and target when you open the trade. SwingTradingLog shows overnight exposure and return on your starting balance so you see whether sizing drifted over the month — not just whether individual picks worked.

Ready to log your swings? Start free on SwingTradingLog, or explore trading guides and the risk calculator.