What Is Slippage?
Slippage occurs when there's a discrepancy between the expected trade execution price and the actual price at which the trade is filled. This deviation often results from market volatility and liquidity gaps, potentially leading to unintended losses—especially in fast-moving or illiquid markets.
Common synonyms include:
- Price deviation
- Execution gap
- Slippage tolerance
How Does Slippage Happen?
Contrary to misconceptions, slippage isn't inevitable. It typically stems from:
- Delayed order processing by brokers
- Intentional price manipulation (rare but possible)
- Market conditions (e.g., rapid price movements)
Key Scenarios Where Slippage Occurs
1. Entry Points
When prices surge rapidly, buy orders may cluster while sellers hold back, pushing execution prices upward. Conversely, sell orders often fill faster with minimal deviation.
2. Stop-Loss Triggers
More critical than entry slippage, stop-loss slippage widens losses when orders execute beyond preset levels.
Example:
A trader buys USD/JPY at 112.88 with a 10-pip stop-loss (112.78). Due to a sharp price drop, the order fills at 112.75—adding 3 unexpected pips to the loss.
| Severity | Slippage Range | Frequency |
|---|---|---|
| Minor | 1-2 pips | Common |
| Noticeable | 5+ pips | Occasional |
Causes of Stop-Loss Slippage
| Cause | Explanation | Impact |
|---|---|---|
| Market Gaps | Price jumps during off-market hours (e.g., weekends) due to news/events | Stop-loss triggers beyond intended levels |
| High Volatility | Extreme price swings from economic data releases | Orders fail to execute at desired prices |
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Slippage Tolerance (SPC): What Traders Should Know
SPC defines how much price deviation a trader accepts during order execution. It’s set as:
- Price points (e.g., 1 pip)
- Percentage (e.g., 0.1%)
Example: With a $1 SPC on a $10 stock buy order, the trade executes up to $11 but not below $10.
Is Higher or Lower Slippage Better?
Depends on your strategy:
| Factor | Low Slippage | Moderate Slippage | High Slippage |
|---|---|---|---|
| Strategy | Day trading/HFT | Swing trading | Long-term investing |
| Market | Liquid, stable | Moderate volatility | High volatility |
| Risk | Low tolerance | Medium tolerance | High tolerance |
FAQ: Addressing Common Concerns
Q: Does higher slippage mean higher fees?
A: No. Slippage reflects execution quality—not broker charges. Fees depend on broker policies, not slippage.
Q: What’s an ideal slippage tolerance setting?
A: For day traders, 1-2 pips; long-term investors might allow 5+ pips.
Q: Can slippage be positive?
A: Yes—if market moves favorably during execution (e.g., buy orders filling below expected).
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Pro Tip
Monitor slippage during high-impact news events (e.g., FOMC announcements) and adjust orders accordingly. Using limit orders instead of market orders can help control execution prices.