Slippage

Understand the real cost of entering and exiting positions by visualizing estimated slippage across price levels based on live order book depth.

What is Slippage?

Slippage measures the price impact of executing a market order of a given size. When you place a market order, you consume resting limit orders from the order book. If the order book is thin, your order will “walk” through multiple price levels to get filled, resulting in an average fill price worse than the current market price. That difference is slippage.

DCT Alpha’s Slippage indicator calculates estimated slippage in real time based on the actual order book depth across exchanges. It shows you, for any given order size, how much price impact you should expect. This is displayed as a sub-chart below the main price chart, giving you a continuous view of market depth quality over time.

A deep, liquid market will show low slippage even for large orders — many resting orders are available to absorb your trade. A thin market will show high slippage even for modest order sizes, meaning the cost of entry and exit is significantly higher. Understanding slippage before you trade helps you size positions appropriately and avoid costly fills in illiquid conditions.

Key Concepts

• Slippage: The difference between the expected price and the actual average fill price of a market order — caused by consuming multiple price levels in the order book
• Market Depth: The total volume of resting orders at each price level — deeper order books result in lower slippage for the same order size
• Order Size Impact: Larger orders consume more levels of the order book, resulting in exponentially higher slippage — a $10K order may have minimal impact, while a $1M order on the same pair could have significant slippage
• Bid/Ask Asymmetry: Slippage can differ between buy and sell sides — if the bid side is thinner than the ask side, selling will have more slippage than buying
• Liquidity Conditions: Slippage changes throughout the day and during volatile events — it typically widens during news events, low-volume hours, and flash crashes

How to Use Slippage

1. Open Chart from the sidebar and navigate to the indicator settings
2. Enable the Slippage indicator
3. The indicator appears as a sub-chart below the main price chart
4. Configure the order size you want to estimate slippage for — the indicator will calculate price impact for that specific size
5. Monitor slippage values over time to identify optimal entry and exit windows when liquidity is deepest

What to Look For

• Bullish signals: Slippage decreasing at a support level indicates that liquidity is building on the bid side — market makers and limit buyers are stacking orders, suggesting confidence in the level holding. A sudden drop in slippage after a volatile move can indicate that the order book is being replenished and conditions are stabilizing.
• Bearish signals: Slippage spiking on the bid side (sell slippage increasing) indicates that buy-side liquidity is being pulled or consumed, making the market vulnerable to sharp drops. If slippage widens asymmetrically — sell-side slippage increasing while buy-side stays flat — it suggests the order book is becoming one-sided and a downward move may follow.
• Key patterns: Slippage tends to spike during high-volatility events as market makers widen their quotes and pull orders. These spikes often coincide with the most dangerous moments to enter a position. Conversely, periods of very low, stable slippage indicate a healthy, well-supported order book where large positions can be entered or exited efficiently.
• Combine with: Depth Heatmap to visually see where the liquidity sits that is reducing slippage, OI Delta to understand whether positions are being opened or closed during high-slippage periods, Aggregated Liquidations to see if slippage spikes coincide with forced liquidation events

Supported Exchanges

Tips

• Always check slippage before sizing a position — a trade that looks profitable on paper can become a loss if slippage on entry and exit consumes the expected move
• Slippage is typically lowest during peak trading hours (US and European market overlap) and highest during Asian session lulls and weekends
• If slippage for your intended order size exceeds 0.1-0.2%, consider splitting the order into smaller pieces or using limit orders instead
• Compare slippage across exchanges to find the best execution venue for your trade size — the same pair can have dramatically different depth on different exchanges
• During extreme volatility, slippage can increase by 10x or more — this is often the worst time to market-order into a position