Intraday trading focuses on positions opened and closed during the same market session.
Intraday trading is trading that occurs within a single market session. Positions are opened and closed before the session ends, so the analysis emphasizes time-of-day liquidity, market data, order type, spread, and volatility.
Intraday trading overlaps with Day Trading. The term “intraday” can also describe price data, charts, or risk measures inside the session, even when the trader is not classified as a day trader.
| Factor | Why it matters |
|---|---|
| Opening and closing periods | Liquidity and volatility can be unusually high |
| Bid-ask spread | Frequent trading makes spread cost central |
| Market data timing | Delayed data can make short-term decisions unreliable |
| Order type | Market orders prioritize speed; limit orders control price |
| News calendar | Economic data, earnings, and policy announcements can move prices quickly |
| Exit rule | Same-session trades need a defined closeout process |
A trader uses an intraday rule that avoids the first five minutes after the open, enters only when volume exceeds a threshold, and exits by 3:50 p.m. local exchange time. The strategy is intraday because the position is not carried overnight, but it still needs a written loss limit and realistic slippage assumptions.
| Term | Use |
|---|---|
| Intraday trading | Broad term for same-session trading activity or analysis |
| Day trading | Specific style or account behavior built around same-day entries and exits |
| Intraday data | Price, volume, quote, and order-book information within one session |
FINRA’s online trading FAQ warns that high volume and volatility can create execution prices that differ from quoted prices. FINRA’s day trading page is useful when intraday activity becomes frequent day trading in a margin account.