Futures Gap Trading

Markets are not perfectly efficient, especially across closed periods. Gaps occur because: 1) the TSX cash market is closed for roughly 17.5 hours daily while global markets trade, 2) news and events happen overnight and shift sentiment, 3) US E-mini S&P 500 (ES) futures, WTI crude, gold and the Montreal Exchange's overnight SXF futures provide continuous price discovery, and 4) opening orders from overnight analysis create imbalances. Gaps represent the market's adjustment to overnight information - a feature of discontinuous cash trading, not a market failure.

No. Be selective: 1) trade gaps meeting the minimum size threshold (gaps under ~0.1% are noise). 2) Skip gaps on news-heavy days (US Fed, Bank of Canada, oil shocks) until you are experienced with event gaps. 3) Prefer common gaps for filling - they are easier to identify. 4) Skip Monday morning gaps initially (the weekend creates uncertainty). 5) Start with 2-3 gap trades per week, focusing on the highest-probability setups. Quality over quantity.

This is a normal risk in gap trading. Protection: 1) your stop is beyond the gap extreme plus a buffer, so you have a defined maximum loss. 2) Do not add to a losing position hoping for a reversal. 3) If stopped out, do not immediately re-enter the same direction - the gap may be a breakaway. 4) Accept that some gaps do not fill the same day. Your stop protects against catastrophic loss while giving the thesis time to work.

Most gaps (70-80%) fill eventually, but 'eventually' can mean days, weeks or months. Breakaway gaps starting major trends may never fill. For intraday gap trading, focus on same-day fills of common gaps. Do not hold positions for days expecting old gaps to fill. Each day is a fresh trade - if a gap does not fill today, reassess tomorrow. Some professional systems track multi-day gap fills, but that requires different capital management.

A quick framework: 1) Was there a major overnight news/event or commodity shock? If yes, the gap is likely a breakaway or continuation, not a common gap. 2) Is the gap within the previous day's range? If yes, it is likely a common gap (fill). 3) Is the gap beyond key support/resistance? If yes, it is a potential breakaway. 4) Check SXF volume in the first 5-10 minutes: high volume signals conviction; low volume points to a common gap. 5) When uncertain, wait and observe - gap behaviour in the first 15-30 minutes clarifies the type.

The S&P/TSX 60 VIX (VIXC) significantly affects gap behaviour: 1) Low VIXC (< 12): a more predictable market, gaps fill more reliably. 2) Normal VIXC (12-16): standard fill rates. 3) Elevated VIXC (> 18): erratic behaviour, gaps may extend further or whipsaw, lower fill rates. 4) VIXC spike (> 25): gap behaviour is unreliable, consider skipping gap trades. Canadian volatility is generally lower than many markets, so adjust your bands to local norms and track your own fill rates by VIXC regime.

General tendencies: 1) Monday: lower fill rates due to weekend news accumulation and uncertainty. 2) Tuesday-Thursday: the most predictable, highest fill rates. 3) Friday: moderate fill rates as traders position for the weekend. 4) Quarterly expiry / rebalance days: erratic behaviour, avoid gap trading. Start by focusing on Tuesday-Thursday gaps, then add Monday/Friday once you have experience. Validate these tendencies against your own S&P/TSX 60 data.

The previous day's range provides key reference points: 1) a gap opening at the previous high (gap up) or low (gap down) sits near strong support/resistance - a good fade entry level. 2) A gap opening beyond the previous range is a potential breakaway - do not fade blindly. 3) A gap into mid-range is a typical common gap, a moderate fade opportunity. 4) Compare gap size to the previous range: a gap exceeding 50% of the prior range is a significant move. Use the previous high/low as natural support/resistance for stop placement.

Use a partial fill approach when: 1) the gap is medium-sized (0.3-0.7%) and may not fully fill same-day. 2) Time is approaching midday with an incomplete fill. 3) Price is approaching support/resistance within the gap zone. 4) Your P&L is positive but momentum is stalling. Use a full fill approach when: 1) the gap is small (< 0.3%) with high probability of a full fill. 2) There is a strong rejection from the gap extreme with momentum toward the fill. 3) The gap is clearly a common type with no catalyst. Default to a partial fill strategy for consistency.

Key differences: 1) single-stock gaps can be larger and more stock-specific (earnings, news). 2) Canadian share-futures liquidity is much lower than the indices - wider spreads at the open and more slippage. 3) Stock gap fills can take longer (less arbitrage pressure). 4) Index gaps reflect broad sentiment; single-stock gaps can be idiosyncratic. Approach: prefer the S&P/TSX 60 (SXF/SXM) and Composite (SCF) index futures for gap trading due to liquidity. For single stocks, only trade large, liquid names, require a larger gap-size threshold, and be more patient with fill time.

Model components: 1) dependent variable: binary (filled / not filled) or time-to-fill. 2) Independent variables: gap size percentile, gap versus previous range, VIXC level, day of week, overnight ES and SXF moves, crude and gold moves, USD/CAD, previous-day trend, and distance from key levels. 3) Method: logistic regression for probability, survival analysis for time-to-fill. 4) Training: a minimum of several hundred gaps over 3-5 years. 5) Validation: out-of-sample testing and walk-forward analysis. 6) Output: a probability score that informs position size and confidence. Update the model quarterly with new data.

Strategy by scenario, using S&P/TSX 60 Index Options (SXO) or XIU ETF options (and accepting wider Canadian spreads): 1) High-probability fill (common gap, low VIXC): sell OTM options in the gap direction - short calls for a gap-up fill, short puts for a gap-down fill - so theta decay helps. 2) Breakaway gap continuation: buy ATM options in the gap direction for leveraged, defined-risk exposure. 3) Uncertain resolution: buy a straddle/strangle to profit from a large move either way. 4) Gap fill with hedged exposure: buy a put (gap up) or call (gap down) as insurance while fading with futures. Watch IV - options are often expensive at volatile opens.

Framework, which matters even more for Canada than for most markets: 1) US lead: a strong move in S&P 500 / ES futures usually produces a correlated TSX gap. 2) Oil: WTI crude shocks drive the energy-heavy index - an oil gap can move the TSX even when US futures are flat. 3) Gold: gold moves drive the materials sector. 4) Currency: USD/CAD gaps can signal flows affecting equities. Strategy: build a dashboard tracking overnight ES, crude, gold and USD/CAD. Strong multi-market alignment increases continuation probability; divergence (the TSX gapping against the US lead) increases fill probability.

Integration approach: 1) Allocation: gap trading is typically 10-20% of a systematic portfolio. 2) Correlation: gap trades are short-term, with lower correlation to multi-day strategies - good diversification. 3) Risk budget: a daily gap-risk allocation (for example, a maximum 2% of capital at risk in gap trades). 4) Performance attribution: track gap P&L separately from other strategies. 5) Regime adaptation: reduce the gap allocation in high-VIXC or strongly trending markets where fills are less reliable. 6) Edge monitoring: track fill rates monthly; if they degrade, reduce the allocation or pause.

Warning signs: 1) fill rates declining consistently (for example, from 75% to 60% over three months). 2) Average fill time increasing. 3) A rising false-breakout rate (gaps starting to fill then reversing). 4) Strategy drawdown exceeding historical norms. 5) Market-structure changes (new trading hours, product or rebalance changes). Response: reduce position sizes, tighten criteria (only the highest-probability setups) and investigate the cause. Edge decay can be temporary (a market phase) or permanent (structural change) - adapt or pause until conditions improve.