fundamentals · beginner

Bid-Ask Spread Explained Simply

The bid ask spread is the small gap between the highest price buyers will pay and the lowest price sellers will accept. Understanding it helps you see the real cost of entering and exiting a trade.

In this lesson, you will learn what the <strong>bid ask spread</strong> means, how it affects your trades, and how to avoid paying more than necessary. We will use simple examples so you can understand the spread before placing real orders.

What Is Spread in Trading?

When beginners ask, <strong>what is spread in trading</strong>, the simple answer is: the <strong>spread</strong> is the difference between the price buyers are offering and the price sellers are asking.

In any active market, there are two sides:

  • <strong>Buyers</strong>, who want to buy an asset at the lowest possible price.
  • <strong>Sellers</strong>, who want to sell an asset at the highest possible price.

    • The <strong>bid price</strong> is the highest price a buyer is currently willing to pay. The <strong>ask price</strong> is the lowest price a seller is currently willing to accept.

    The formula is simple:

    <strong>Spread = Ask Price - Bid Price</strong>

    For example:

  • Bid price: $99.90
  • Ask price: $100.00
  • Spread: $0.10

    • This means the market has a $0.10 gap between the best buyer and the best seller. If you buy immediately at the ask price and then sell immediately at the bid price, you would lose $0.10 per unit before fees. That is why the spread is a real trading cost.

    The spread exists in many markets, including crypto, stocks, forex, and commodities. In crypto trading, it can be especially important because some coins have very active markets while others have low activity.

    Bid vs Ask Price: A Simple Example

    Understanding <strong>bid vs ask price</strong> is one of the first steps in reading a trading screen.

    Imagine you are looking at a Bitcoin market on an exchange. You might see:

  • Best bid: $67,000
  • Best ask: $67,005

    • The best bid means someone is ready to buy Bitcoin at $67,000. The best ask means someone is ready to sell Bitcoin at $67,005.

    The spread is:

    <strong>$67,005 - $67,000 = $5</strong>

    If you place a market buy order, which is an order that buys immediately at the best available price, you will likely buy near $67,005. If you place a market sell order, you will likely sell near $67,000.

    This does not mean the exchange is charging you $5 directly. It means the market prices available to you have a $5 gap. You may still pay separate trading fees on top of that, depending on the platform.

    Here is a simple everyday comparison. Imagine a shop sells apples for $1.00, but if you sell apples back to the shop, it only pays $0.90. The $0.10 difference is similar to a spread. You pay more to buy than you receive when selling immediately.

    On a trading platform such as CoinW, you can usually see bid and ask prices in the order book. The <strong>order book</strong> is a live list of buy orders and sell orders placed by traders. The highest buy order is the best bid, and the lowest sell order is the best ask.

    Why the Bid Ask Spread Changes

    The <strong>bid ask spread</strong> is not fixed. It changes based on market conditions. Some markets have very tight spreads, while others have wide spreads.

    A <strong>tight spread</strong> means the bid and ask prices are close together. For example:

  • Bid: $100.00
  • Ask: $100.01
  • Spread: $0.01

    • A <strong>wide spread</strong> means the bid and ask prices are far apart. For example:

  • Bid: $100.00
  • Ask: $101.00
  • Spread: $1.00

    • Several things can affect the spread:

  • <strong>Liquidity:</strong> Liquidity means how easy it is to buy or sell an asset without moving the price much. High-liquidity markets usually have tighter spreads because many buyers and sellers are active.
  • <strong>Trading volume:</strong> Volume means how much of an asset is traded over a period of time. Higher volume usually helps reduce the spread.
  • <strong>Market volatility:</strong> Volatility means how quickly and sharply prices move. During fast price moves, spreads can widen because traders are less sure about the fair price.
  • <strong>Time of day:</strong> Some markets are more active during certain hours. When fewer traders are active, the spread may become wider.
  • <strong>Asset popularity:</strong> Major assets like Bitcoin or Ethereum often have tighter spreads than small or new tokens.

    • For beginners, this matters because a wide spread can make a trade more expensive. Even if your chart looks good, the actual price you get may be worse than expected if the spread is large.

    How Traders Can Manage Spread Costs

    The spread is part of trading, but you can reduce its impact by using careful habits.

    First, check the spread before entering a trade. Do not only look at the last traded price. The <strong>last traded price</strong> is the price of the most recent completed trade, but it may not be the price you can buy or sell at right now. Always compare the current bid and ask.

    Second, be careful with market orders. A <strong>market order</strong> tells the exchange to buy or sell immediately at the best available price. Market orders are fast, but they can be costly when the spread is wide or when the order book is thin.

    Third, consider using limit orders. A <strong>limit order</strong> lets you choose the maximum price you are willing to pay when buying, or the minimum price you are willing to accept when selling. For example, if the ask price is $100.50 but you only want to buy at $100.20, you can place a buy limit order at $100.20. The order will only fill if the market reaches your price.

    Limit orders can help you control price, but they are not guaranteed to fill. If the market moves away, your order may remain open.

    Fourth, avoid trading very low-liquidity assets unless you understand the risk. A token may look attractive because the chart is moving, but if the spread is wide, entering and exiting can be difficult. For example, if a token has a bid of $0.095 and an ask of $0.105, the spread is $0.010. That may look small, but compared with the price, it is more than 10% of the bid price. This means the trade starts at a large disadvantage.

    Fifth, include the spread in your profit target. If you are trying to make a very small profit, the spread and fees can erase your gain. For example, if you expect a 0.2% move but the spread is 0.15% and fees are extra, the trade may not be worth taking.

    A practical beginner checklist:

  • Look at the <strong>bid price</strong> and <strong>ask price</strong> before trading.
  • Calculate the spread in dollars and as a percentage.
  • Use limit orders when you want more price control.
  • Be extra careful during news events or fast market moves.
  • Avoid assets with very wide spreads unless you have a clear plan.

    • Key Takeaways

  • The <strong>bid ask spread</strong> is the difference between the best buying price and the best selling price.
  • The <strong>bid price</strong> is what buyers are willing to pay, while the <strong>ask price</strong> is what sellers are willing to accept.
  • A tight spread usually means the market is more liquid and cheaper to trade.
  • A wide spread can increase your trading cost and make it harder to exit profitably.
  • Beginners should check the spread before every trade and consider using limit orders for better price control.

    • Interactive lesson at /learn/lesson/bid-ask-spread-explained-simply