Exploit the price gaps that form between yesterday's close and today's open for rapid intraday profits.
A gap occurs when a stock opens significantly higher (gap-up) or lower (gap-down) than the previous day's closing price, creating a visible empty space on the chart. On the NSE, gaps happen daily due to overnight global market movements, corporate announcements, economic data releases, and pre-market order imbalances. Gap trading strategies aim to profit from these opening price dislocations by predicting whether the gap will fill (price returns to the previous close) or continue (price keeps moving in the gap direction).
Indian markets are particularly prone to gaps because there is an 18-hour overnight period (3:30 PM to 9:15 AM) during which US markets, European markets, and Asian markets trade. Significant moves in the Dow Jones, S&P 500, or SGX Nifty futures overnight directly influence how the NSE opens. Stocks with pending news - earnings, board meetings, regulatory changes - can gap 3-10% on the open, creating trading opportunities for prepared traders.
There are four types of gaps that behave differently: common gaps (fill quickly, low significance), breakaway gaps (start of new trends, do not fill), runaway/continuation gaps (occur mid-trend, partially fill), and exhaustion gaps (occur at trend end, fill completely). Understanding which type you are dealing with is the key to profitable gap trading. Approximately 70% of common gaps on Nifty 50 stocks fill within the same trading session, making gap-fill strategies statistically favourable.
Small gaps (0.3-1%) that occur without any significant news or volume. These gaps are caused by normal overnight order flow and fill within the first 1-2 hours about 70-80% of the time. Most gap-fill strategies target common gaps. They appear in range-bound or slowly trending markets.
Large gaps (2%+) that occur on very high volume, typically breaking out of a consolidation pattern. These gaps rarely fill in the short term and signal the start of a new trend. Do not fade (trade against) breakaway gaps. Instead, trade in the direction of the gap and use the gap zone as support for your stop-loss.
Gaps that occur in the middle of a strong trend, indicating continuation. Volume is elevated but not as extreme as breakaway gaps. Runaway gaps may partially fill (50-61.8% retracement into the gap) before the trend resumes. They serve as mid-trend support and resistance levels.
Gaps that occur at the end of a trend, often on high volume but with a quick reversal. They look like breakaway gaps initially but fail within 1-3 days. If a stock gaps up at the end of a long uptrend and reverses sharply, it is likely an exhaustion gap. These fill completely and often reverse the prior trend.
Before 9:15 AM, check pre-market data on Zerodha Kite, Moneycontrol, or NSE website to identify stocks showing significant gaps. Check SGX Nifty for the index gap. List all stocks gapping more than 0.5%. Note the gap size, direction, and whether any news caused the gap (earnings, upgrades, global events).
Determine if the gap is common, breakaway, runaway, or exhaustion based on: gap size (small = common, large = breakaway), volume at open (massive = breakaway), context (mid-trend = runaway, end of trend = exhaustion), and catalyst (no news = common, major news = breakaway). This classification drives your trading direction.
Do not trade in the first 5-15 minutes. Watch how the stock behaves after the open. For gap-fill plays, wait to see if the stock starts reversing towards the previous close. For gap-continuation plays, wait for the stock to hold the gap and show strength. The first 15 minutes establish the intraday trend.
For gap-fill: enter a counter-trend trade (short a gap-up or buy a gap-down) targeting the previous day's close. For gap-continuation: enter in the gap direction targeting the next support/resistance level. Use a limit order for precise entry and place a bracket order with predefined stop and target.
Gap trades are morning plays. Most gap fills happen between 9:30 AM and 12:00 PM. If the gap has not filled by noon, it is less likely to fill that day. Similarly, gap-continuation moves typically make their strongest push in the first 90 minutes. Set a time-based exit for 12:00-12:30 PM regardless of profit or loss.
For gap-fill trades, the target is the previous day's closing price. Do not get greedy and hold beyond the gap fill. The stock may bounce off the previous close or overshoot slightly, but statistically, the gap fill level is where the trade's edge expires. Exit 80-100% of your position at the gap fill level.
When a stock gaps up 0.5-1.5% into a known daily chart resistance level and the opening 15-minute candle forms a bearish pattern (shooting star, bearish engulfing), short the stock targeting the previous close. The gap-up into resistance creates a high-probability fade setup because the gap has brought the stock to a level where sellers are already waiting.
When a stock gaps down to a well-defined support level (previous swing low, 200 DMA, or horizontal support) and shows buying in the first 15 minutes (bullish hammer or engulfing on the 5-minute chart), go long targeting the gap fill. Support levels attract buyers, and the gap-down brings the stock precisely to where buying interest exists.
When a stock gaps above its 52-week high or above a major consolidation pattern's resistance on heavy volume, go long. This is a breakaway gap and should not be faded. Enter when the stock holds above the opening price for the first 15 minutes and starts making new highs. The stop goes below the opening print.
Sometimes a gap-up stock will partially fill the gap (retrace 50-61.8% of the gap) and then reverse higher. This is a powerful long signal because the partial fill has shaken out weak hands. Enter long when the stock bounces off the 50% gap-fill level on a bullish 5-minute candle, with a stop just below the 61.8% retracement of the gap.
When a stock gaps up/down and then forms a tight 15-minute opening range, a breakout of this range gives a strong directional signal. If the gap-up stock breaks above its opening range high, it confirms gap-continuation (buy). If it breaks below the opening range low, it confirms gap-fill (sell). The opening range acts as a decision zone.
When a gap-up stock completely fills the gap (returns to the previous close) and immediately bounces with a strong bullish candle, the gap-fill has been "completed" and the stock often resumes the uptrend. Enter long at the previous close with a tight stop ₹5-10 below. This works best when the overall trend is bullish and the gap-fill was a healthy correction.
For gap-fade trades, exit when the stock reaches the previous day's closing price. This is your primary target. Do not wait for the stock to go past the previous close on a gap-fade, as the trade's statistical edge diminishes beyond this point. Book 100% of the position at the gap fill.
If you are in a gap-continuation trade (long a gap-up) and the stock breaks below the first 15-minute candle's low, exit immediately. The opening range has failed to hold, indicating the gap may be an exhaustion gap rather than a breakaway. The first 15-minute low is your structural stop.
Gap trading is a morning strategy. If your trade has not reached its target by noon, the gap's influence on price action has faded and other factors are now driving the stock. Exit at market price around 12:00-12:30 PM to free up capital and avoid afternoon choppiness.
If you are long (gap-down bounce) and the stock crosses below VWAP, exit. If you are short (gap-up fade) and the stock crosses above VWAP, exit. VWAP is the institutional benchmark price, and when it turns against your position, the intraday trend has shifted. Do not fight the VWAP direction.
For gap-continuation trades, the target is typically 1.5-2x the gap size beyond the opening price. If a stock gapped up ₹40 and opened at ₹2,040 (from a ₹2,000 close), the continuation target is ₹2,060-2,080. Book profits here as the stock often stalls at this extension level and pulls back for a retest.
If a massive volume candle (3x+ average) forms against your position direction, exit regardless of your target. These extreme-volume candles signal institutional order flow reversing the intraday trend. For example, if you are short a gap-up and a huge green candle appears on the 5-minute chart, the gap-fill thesis is invalidated.
Gap trades carry higher risk due to opening volatility and potential slippage. Risk 1% of capital per gap trade - no more. With ₹5,00,000 capital, your maximum risk is ₹5,000. Since gap trades often have tight stops (within the gap range), you can take reasonable position sizes. For a stock gapping ₹20 with a ₹10 stop, you would take 500 shares.
For gap-fill trades: place the stop above the opening high (for shorting gap-ups) or below the opening low (for buying gap-downs). The opening extreme is the invalidation point - if the stock makes a new high after your fade entry, the gap is continuing, not filling. Keep stops within 0.5-1% of entry for gap trades.
Only trade gaps between 0.5% and 3% of the stock price. Gaps smaller than 0.5% do not offer enough profit potential. Gaps larger than 3% are often breakaway gaps driven by fundamental news and should not be faded. The sweet spot for gap-fill strategies is 0.7-2% gaps on liquid Nifty 50 stocks.
Limit yourself to 2-3 gap trades per morning session. Gap setups happen in the first 90 minutes, and taking too many positions splits your attention and increases exposure. Focus on the 1-2 highest-conviction setups where the gap type is clear and the technical context supports your thesis.
Infosys closed the previous day at ₹1,520. Overnight, US tech stocks fell 1.5% on profit-taking (no fundamental catalyst). Infosys opens at ₹1,502 - a gap-down of ₹18 (1.2%). This is a common gap (no company-specific news, moderate size, in a range-bound market). The 15-minute opening candle forms a hammer at ₹1,500 (round number support), with the low at ₹1,496. Volume on the hammer is above average. VWAP is at ₹1,501.
Outcome: Infosys bounces from ₹1,500 support and steadily climbs towards the gap fill. By 11:15 AM, it reaches ₹1,518 - within ₹2 of the gap fill. You exit 450 shares at ₹1,518 for ₹6,750 profit and let 100 shares run with a stop at ₹1,510. The stock touches ₹1,521 at 11:45 AM and you exit the rest. Total profit: ₹8,550 in under 2 hours. Net after brokerage: ₹8,470.
The most critical indicator for gap trades. After a gap-up, if the stock trades below VWAP, the gap is likely to fill. After a gap-down, if the stock trades above VWAP, the gap is likely to fill. VWAP also serves as the equilibrium price - gap-fill targets often align closely with VWAP convergence.
Check the pre-market session volume (9:00-9:15 AM on NSE). Heavy pre-market volume on a gap indicates institutional participation, which makes the gap more likely to be a breakaway. Light pre-market volume suggests a common gap that is likely to fill. Most Indian brokers show pre-market data.
The first 15-minute candle after the gap defines the opening range. Breakout above the opening range high in a gap-up = continuation. Breakdown below the opening range low in a gap-up = fill. This simple framework provides clear directional guidance for gap trades and eliminates guesswork.
These three levels are critical reference points for gap trades. The previous close is the gap-fill target. The previous high/low may provide support or resistance. Mark these levels on your intraday chart before the market opens. They serve as natural magnets for price during gap-fill movements.
A short-period RSI on the 5-minute chart helps identify when the gap-induced momentum is exhausted. After a gap-up, RSI below 40 on the 5-minute chart suggests selling momentum for a gap-fill. After a gap-down, RSI above 60 on the 5-minute chart supports a gap-fill bounce.
The SGX Nifty (now Gift Nifty) futures trade overnight and indicate where the NSE will open. A large overnight move in Gift Nifty signals a big gap at the open. Monitor this before 9:15 AM to prepare your gap trades. The correlation between Gift Nifty movement and NSE opening gap is very high (0.9+).
Not all gaps fill. Blindly shorting every gap-up or buying every gap-down will result in losses from breakaway gaps that never fill. Always classify the gap type before trading. If a stock gaps 5% on record earnings, do not fade it - that is a breakaway gap with fundamental backing.
Gaps in small-cap or low-volume stocks are unreliable. Wide spreads at the open can result in terrible fills, and the gap may not fill due to low liquidity. Stick to Nifty 50 or F&O stocks for gap trading where liquidity ensures tight spreads and reliable gap-fill statistics.
The first few minutes after the market opens are chaotic with wild price swings. Entering a gap trade at the opening tick often results in slippage and poor fills. Wait 5-15 minutes for the opening range to form, then make your entry decision based on the opening candle pattern.
Gap trading is a morning strategy. If the gap has not filled by 12:00-12:30 PM, it is unlikely to fill that session. Holding beyond noon exposes you to afternoon news events, lunch-hour low volume, and random price action that has nothing to do with the morning gap.
If Dow futures, S&P 500, and Asian markets are all down 2%+, fading a Nifty gap-down is risky because global selling pressure may continue. Always consider the global context before trading gaps. Gap-fills work best when the gap is a local phenomenon (stock-specific) rather than a broad market event.
Open your Demat account today and take the first step towards mastering the stock market.
Click Here to Get Started