The most effective way to reduce slippage is to use limit or marketable-limit orders, trade liquid markets during active sessions, keep order size within available liquidity, and avoid placing market or stop-market orders during fast-moving conditions. Slippage cannot be eliminated completely. News, gaps, outages and sudden liquidity shortages can still produce a worse fill.

FINRA's 2025 annual oversight report also highlights execution quality as something traders should assess when comparing brokers. The 9 sections below explain how order type, liquidity, timing, position size and broker execution affect slippage.

Slippage Reduction at a Glance

Action How it helps Main trade-off
Use a limit order Sets the worst price you will accept The order may not fill
Use a marketable-limit order Seeks a prompt fill while capping the price The limit may still be missed
Trade liquid instruments More available liquidity can reduce price movement between fills Less-liquid assets may offer larger price moves
Reduce or split large orders Lowers the chance of consuming several price levels More orders can add fees or delay
Avoid volatile event windows Reduces exposure to rapid quote changes You may miss a planned trade
Compare broker execution quality Routing and execution systems can affect fills Results vary by market and account
Reduce leverage and position size Limits the financial damage from a given amount of slippage It does not prevent the price difference

1. Use Limit Orders When Price Matters More Than Immediate Execution

A limit order lets you set the highest price you will pay when buying or the lowest price you will accept when selling. A buy limit can execute only at the limit price or lower. A sell limit can execute only at the limit price or higher.

For example:

  • If a stock is quoted at $50.00 and you place a buy limit at $50.05, you will not pay more than $50.05.
  • If the market moves above $50.05 before the order fills, the order may remain open or expire without execution.

A limit order gives you direct control over the worst acceptable price, but it does not guarantee a fill. If the market moves away from your limit, you may miss the trade entirely.

Use a Marketable-Limit Order When You Need Both Speed and Price Control

A marketable-limit order is a limit order placed at or beyond the current opposite quote.

Suppose the best offer is $50.00. A buy limit at $50.05 may execute immediately because sellers are already offering shares below your limit. The order should not execute above $50.05.

This order type can suit traders who want a high chance of execution without giving the market unlimited price discretion. The limit still needs to be realistic. Set it too close to the current quote and you may receive only a partial fill, or no fill at all.

2. Understand the Slippage Risk of Market and Stop Orders

A market order prioritises execution over price. It normally executes against the best available liquidity, but the final fill can differ from the price shown when you submitted the order. A large order may execute across several price levels.

A stop order creates a similar risk. Once the stop price is reached, a standard stop order generally becomes a market order. The stop price triggers the order, but it does not guarantee the execution price.

Market Order Versus Stop-Limit Order

Order type Price protection Execution certainty Best use
Market order Low High in normal liquidity Urgent entry or exit
Limit order High Lower Planned entries and exits
Stop-market order Low after trigger Usually higher Risk exits where getting out matters most
Stop-limit order High Lower after trigger Risk exits where price control matters more than a guaranteed exit

A stop-limit order becomes a limit order after the stop price is reached. It can prevent an unexpectedly poor fill, but it may not execute if the market moves beyond the limit. Your position could remain open during a sharp move.

Use a stop-limit order only if you understand the risk of non-execution. For an emergency exit, a stop-market order may be more appropriate, even though the fill can be worse than the trigger price.

3. Trade Liquid Markets and Avoid Thin Liquidity

Slippage tends to increase when fewer buyers and sellers are available near the current price. Liquidity can weaken in:

  • Small-cap or lightly traded stocks
  • Illiquid options
  • Exotic forex pairs
  • Low-volume cryptocurrency markets
  • Futures contracts outside their most active trading hours
  • Periods immediately before or after major economic announcements

The last-traded price is not necessarily the price available for your order. Your fill depends on the current bid, ask and available size. The SEC notes that fast-moving markets and limited liquidity can cause market orders to execute away from the displayed or recently traded price.

Before entering a trade, check:

  1. The bid-ask spread
  2. The quantity available at the best bid and offer
  3. Recent trading volume
  4. Whether a scheduled news event is approaching
  5. Whether the instrument regularly shows wide or unstable quotes

A narrow spread does not guarantee a good fill. If little size is available at the quoted price, a larger order can still move through several levels of the order book.

4. Reduce Order Size or Split Larger Trades

A large market order can consume the available liquidity at the best price. The remaining quantity may then execute at progressively worse prices. The SEC identifies this as a reason why parts of a large market order can fill at different prices.

If your strategy allows it, consider:

  • Reducing the total position size
  • Splitting the order into smaller pieces
  • Using limit orders at defined price levels
  • Waiting for more liquidity before completing the trade
  • Using a time-based or volume-based execution algorithm, if your broker provides one

Splitting an order does not guarantee a better average price. It can increase execution time and fees, and the market may move before the remaining orders fill. The purpose is to avoid consuming several price levels unnecessarily.

5. Avoid Placing Orders During Extreme Volatility

Slippage risk rises when prices move faster than an order can be transmitted, routed and filled. An order travels from your platform to your broker and then to an execution venue. The available quote can change during that process.

Take extra care around:

  • Company earnings releases
  • Interest-rate decisions
  • Employment and inflation reports
  • Central-bank announcements
  • Market openings and closings
  • Unexpected geopolitical or company news
  • Exchange halts, trading interruptions and platform outages

You do not have to avoid every volatile period. If volatility is part of your strategy, reduce order size, use price limits where practical and assume that stops may execute below or above the trigger price.

6. Use the Bid and Ask, Not Only the Chart Price

Many trading charts display the last traded price. Buy orders generally execute against the ask, while sell orders generally execute against the bid.

That difference creates two common mistakes:

  • A trader sees the chart touch a level, but a buy limit does not fill because the ask never reached the limit.
  • A trader expects a market buy to execute at the last-traded price even though the ask has already moved higher.

For short-term trading, monitor the live bid, ask, spread and available quantity. The chart remains useful for analysis, but it is not always the price that determines execution.

7. Choose a Broker Based on Execution Quality, Not Only Commission

A low commission does not automatically mean a low trading cost. Your total execution cost can include:

  • Bid-ask spread
  • Negative slippage
  • Missed fills
  • Partial fills
  • Routing delays
  • Exchange and platform fees
  • Price improvement that you did or did not receive

For U.S. stocks, brokers and execution venues publish information that can help investors compare execution speed, price improvement and effective spreads. FINRA also expects firms to review execution quality and order routing regularly.

When comparing brokers, review:

  • Average execution speed
  • Average effective spread
  • Frequency and size of negative slippage
  • Frequency of positive price improvement
  • Treatment of stop orders
  • Partial-fill policies
  • Order-routing disclosures
  • Reliability during volatile markets

For retail forex and CFD trading, the broker's pricing and execution model matter because trades may be executed against the broker's or liquidity providers' quote streams rather than a single central exchange order book. Read the broker's slippage, requote and execution policy before trading.

8. Measure Your Actual Slippage

Do not rely only on advertised execution speed. Track the difference between your decision price and your actual fill.

For a buy order:

Slippage = execution price - reference price

For a sell order:

Slippage = reference price - execution price

A positive result represents worse execution for the trader. Use a consistent reference price, such as:

  • The ask for a buy order
  • The bid for a sell order
  • The quote available immediately before submitting the order
  • The intended limit or stop price when analysing order-specific slippage

Record the following for at least 30 to 50 trades:

  • Instrument
  • Order type
  • Time of day
  • Market conditions
  • Spread at entry
  • Order size
  • Expected price
  • Actual fill price
  • Positive or negative slippage
  • Whether the order filled fully or partially

This record can show whether slippage is mainly linked to your order type, trading time, instrument selection, order size or broker execution.

9. Do Not Confuse Leverage With Slippage

Leverage does not directly change the difference between your expected price and your execution price. It changes the size of the position relative to your account, which makes a given amount of slippage more costly.

For example, a two-point adverse move on a small position may be manageable. The same move on a highly leveraged position can materially affect your account.

To reduce the financial impact of slippage:

  • Use smaller position sizes
  • Keep sufficient margin available
  • Avoid oversized trades in illiquid markets
  • Do not assume a stop will fill exactly at its trigger price
  • Stress-test the trade for a worse-than-expected execution

What Should You Check Before Placing an Order?

Check the instrument's liquidity, the live bid and ask, the urgency of the trade, upcoming news, the available order-book depth, your broker's past execution and the effect of leverage.

Use this checklist:

  1. Is the instrument liquid enough for my position size?
  2. What are the current bid, ask and spread?
  3. Do I need an immediate fill, or is price control more important?
  4. Would a marketable-limit order be suitable?
  5. Is a major news event approaching?
  6. Could my order consume multiple price levels?
  7. If this is a stop-limit order, can I accept the risk of no fill?
  8. How did this broker execute similar orders in my trading records?
  9. Is my leverage making normal slippage financially dangerous?

Bottom Line

Choose the order type based on the risk you are trying to control. Limit and marketable-limit orders give you more price control. Market and stop-market orders prioritise execution. Stop-limit orders protect price but can leave a position open.

No order type removes slippage. The practical rule is to match order size and order type to the liquidity and speed of the market in front of you.