Overnight Gap Risk: What Swing Traders Should Track Before the Bell

Swing trading profits from moves that take more than one session. That same time horizon exposes you to gaps: prices that open above or below the prior close without you getting a fill in between. Earnings, macro headlines, and sector news all land while the market is closed.

Notional exposure vs. planned risk

Planned risk is what you lose if your stop is hit. Overnight exposure is how much capital is tied up in open positions when you cannot react. A ₹2 lakh position with a tight stop still gaps through that stop on a bad open. Track both numbers.

• Sum entry notional across all Active positions
• Flag positions held over Friday close into Monday
• Note earnings dates within your hold window
• Cap total overnight notional as a percent of account equity

Weekend and holiday risk is different

A two-day weekend is not just double an overnight hold. Liquidity is thinner at the open, and news stacks up. Many traders reduce size before long weekends or hedge index exposure when carrying multiple correlated names.

Use gap risk in your pre-trade checklist

Before you enter, ask: If this gaps 3% against me at the open, am I still within daily loss limits? If not, size down or skip. SwingTradingLog surfaces overnight and weekend exposure on the dashboard so you see aggregate gap risk next to P&L, not buried in a spreadsheet.

Practical rule of thumb

Keep total active notional under a fixed cap — for example 40% of equity for diversified swings, lower if names are correlated. Review the cap every Friday before the close. Discipline on exposure often matters more than picking one extra winner.

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