Stock Gap Trading

Look for a 'jump' in price between yesterday's close and today's open. The gap appears as a space on the chart where no trading occurred. Compare today's first candle opening price with yesterday's last candle closing price. Most charting platforms highlight gaps automatically. Note that pre-market and after-hours prints can blur gaps - use the regular-session (9:30 AM ET) open for the cleanest gap.

No. Only trade gaps that meet your criteria: minimum size (>0.5%), clear catalyst (or lack thereof for fades), proper volume confirmation, and good risk/reward. Most gap traders take 1-2 trades per day maximum. Quality over quantity.

Gap up simply describes the opening condition (opens higher than previous close). Gap up follow is a trading STRATEGY - you trade in the gap direction (go long), expecting price to continue higher. The opposite would be gap up fade (short, expecting fill).

About 50-60% of gaps fill the same day. About 70% fill within a few days. However, strong breakaway gaps may not fill for weeks or months. Gap fill probability depends on gap type, catalyst strength, and volume.

Wait for the opening range to form (first 15-30 minutes after 9:30 AM ET). Enter when price breaks the opening range in your expected direction. Avoid the first 5 minutes (too volatile) and the last 30 minutes (reduced liquidity and end-of-day/closing-auction volatility).

Pre-earnings: Consider straddles if expecting a large move. Post-earnings: Wait for the opening range, assess the catalyst (beat/miss, guidance), check volume. Earnings gaps are often large but don't assume continuation - overreactions are common. The first reaction is frequently overdone if the gap is >5%. Remember US companies report after the 4 PM ET close or before the open.

Context is key. Exhaustion gaps occur after extended trends (20+ days in one direction), have extreme RSI, and quickly reverse. Breakaway gaps occur at pattern breakouts, have high volume with follow-through, and don't quickly reverse. Also check: Was there a catalyst? Exhaustion gaps often lack one.

Both have merits. Index gaps (S&P 500, Nasdaq-100) are more predictable (driven by known global factors and ES/NQ futures) but smaller. Stock gaps are larger and have clearer catalysts but are more volatile. Many traders focus on 1-2 stock gaps plus the S&P 500/Nasdaq-100 (via SPY/QQQ or ES/NQ futures) for diversification.

Volume > 1.5x average supports a gap follow (conviction behind the move). Volume < 1.0x average supports a gap fade (no conviction). Check volume throughout the day - if volume increases in your trade direction, conviction is building. Declining volume warns of a potential reversal.

Pre-event (unknown direction): Long straddle/strangle. Post-gap follow: ITM calls (gap up) or ITM puts (gap down) for high delta. Post-gap fade: Put spreads (gap up fade) or call spreads (gap down fade) for defined risk. Use weekly/0DTE options for same-day trades (the indexes and many large caps offer them), monthly for multi-day. Each US option contract controls 100 shares.

Collect historical gap data (size, direction, catalyst, fill rate, time to fill). Build features: Gap size, volume ratio, pre-gap trend, sector context, VIX, market regime. Train a classifier for fade vs follow prediction. Backtest with walk-forward validation. Key metrics: Win rate >50%, profit factor >1.5.

Island reversal: Gap up, 1+ days of trading, then gap down (or reverse). Wait for the second gap to complete the 'island'. Enter in the direction of the second gap. Very high probability (~75%+). Target: Full island range + extension. Stop: Beyond the island high/low.

Bull market: Favor gap up follows, gap down fades. Bear market: Favor gap down follows, gap up fades. Ranging: Favor fades for both directions. High VIX (>25): Reduce position size 50%, widen stops, expect larger gaps. Low VIX (<12): Standard strategies, tighter stops. Classify the regime weekly (S&P 500 vs its 200 DMA, VIX, breadth) and adjust parameters.

Pre-market scanner (ES/NQ futures, global markets, news). Opening gap detector with classification. Opening range calculator. Signal generator for entry triggers. Bracket order logic (entry + stop + target). Risk management (daily loss limits, max trades, PDT awareness). Backtesting framework for strategy refinement. On AlgoKing this is studied and simulated for education, not executed live.

Pre-event: IV elevated, options expensive. Post-event: IV crushes (drops), hurting long premium. For post-gap options: Use ITM (less IV-sensitive), enter quickly while IV is still elevated. For a gap follow: Buy ITM calls/puts with high delta. For a gap fade: Consider selling premium (benefit from IV crush) or use spreads.