{"id":1349,"date":"2025-11-06T00:27:52","date_gmt":"2025-11-05T21:27:52","guid":{"rendered":"https:\/\/investopedia.su\/ru\/?p=1349"},"modified":"2025-12-12T23:08:59","modified_gmt":"2025-12-12T20:08:59","slug":"order-book","status":"publish","type":"post","link":"https:\/\/investopedia.su\/en\/order-book\/","title":{"rendered":"The Order Book"},"content":{"rendered":"\n

Order Book (or DOM)<\/strong> is a tool of the trading terminal that displays a queue of unexecuted limit orders for buying and selling.
It consists of two parts: “bids” (buyers) with prices below the current market level and “asks” (sellers) with prices above. For each price, the total volume that the market is ready to buy or sell is indicated. This information helps traders assess the real liquidity situation: to see at which levels major players are concentrated and to predict short-term price movements. It is believed that the rapid “absorption” of large orders indicates a likely price increase in that direction.<\/p>The key function of the glass is to provide an understanding of market depth and the strength of buyers\/sellers, which is critically important for making accurate trading decisions.<\/cite><\/blockquote><\/figure>\n\n\n\n

The order book is an electronic table that displays current limit orders from buyers and sellers for a specific asset (stock, bond, currency pair, cryptocurrency, etc.) in the trading system. It represents a visualization of the order book, where market participants’ intentions are recorded in real-time. Although the terms “order book,” “quote book,” and “trading book” are often used interchangeably, there are subtle nuances between them that are important to understand for a deep analysis of the market situation.<\/p>\n\n\n\n\n\n

What does the Order Book mean?<\/h3>\n\n\n\n

The term “Order Book<\/strong>” is the most general and widely used. It is the basic term that describes the visualization tool itself.<\/p>\n\n\n\n

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  • Origin of the Name.<\/strong>\u00a0The metaphor “book<\/strong>” (or “glass<\/strong>” in Russian, which translates to “order book<\/strong>” in this context) arose from the visual resemblance of the order table to a container where buy and sell orders are “poured.” The two columns\u2014bid (buy) and ask (sell)\u2014form its “walls,” and the difference in\u00a0prices<\/strong>\u00a0between the best orders creates its “bottom.”<\/li>\n\n\n\n
  • Fundamental Role.<\/strong>\u00a0This tool is a direct reflection of current supply and demand in real time, showing not only the last trade but also the potential for future\u00a0price<\/strong>\u00a0movement.<\/li>\n\n\n\n
  • Data Structure.<\/strong>\u00a0The information in it is updated at high speed, sometimes several times per second, reacting to the actions of market makers, retail investors, and algorithmic trading robots.<\/li>\n\n\n\n
  • Direct Market Access.<\/strong>\u00a0The presence of this tool in a trading terminal indicates direct access to the\u00a0exchange’s<\/strong>\u00a0order book, which is characteristic of modern electronic trading platforms.<\/li>\n\n\n\n
  • Significance for the Trader.<\/strong>\u00a0For a market participant, it is a “window” into the market’s pulse, allowing them to assess liquidity, volatility, and the psychology of other players.<\/li>\n<\/ul>\n\n\n\n

    What is Price Depth?<\/h3>\n\n\n\n

    The term “Price Depth<\/strong>” emphasizes the price<\/strong> levels at which market participants are willing to transact. It highlights the price dimension of the order book.<\/p>\n\n\n\n

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    • Focus on Price.<\/strong>\u00a0In this context, the focus is on the specific values at which orders are queued. Each row in the table is a specific\u00a0price<\/strong>\u00a0level, not just an individual order.<\/li>\n\n\n\n
    • Market Depth.<\/strong>\u00a0The concept of “market depth” is directly related to\u00a0Price Depth<\/strong>, as it shows how far from the current\u00a0price<\/strong>\u00a0there are significant accumulations of orders that can act as support or resistance.<\/li>\n\n\n\n
    • Cluster Analysis.<\/strong>\u00a0Analysts using this tool often look for large accumulations of orders (clusters) at certain\u00a0price<\/strong>\u00a0levels, which can slow down or reverse an asset’s movement.<\/li>\n\n\n\n
    • Price Levels.<\/strong>\u00a0This term is more often used when a trader discusses strategies based on breaking through or bouncing off key levels displayed in the\u00a0order book<\/strong>.<\/li>\n\n\n\n
    • Tactical Planning.<\/strong>\u00a0When placing a limit order, a trader relies precisely on the\u00a0Price Depth<\/strong>, choosing the optimal level for entry or exit.<\/li>\n<\/ul>\n\n\n\n

      What is Market Depth?<\/h3>\n\n\n\n

      The expression “Market Depth<\/strong>” semantically shifts the focus from pure price<\/strong> levels to the process of quoting, i.e., the establishment of the current bid and ask prices<\/strong>.<\/p>\n\n\n\n

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      • Emphasis on the Quote.<\/strong>\u00a0A quote is not just a\u00a0price<\/strong>, but a pair of values: the best bid\u00a0price<\/strong>\u00a0and the best ask\u00a0price<\/strong>. Thus,\u00a0Market Depth<\/strong>\u00a0is an expanded version of a quote, showing not only the best\u00a0prices<\/strong>\u00a0but also the subsequent ones.<\/li>\n\n\n\n
      • The Spread.<\/strong>\u00a0The first thing noticed in this view is the difference (spread) between the highest bid and the lowest ask. A narrow spread usually indicates high asset liquidity.<\/li>\n\n\n\n
      • Source of Quotes.<\/strong>\u00a0Market makers and large participants form these very quotes with their orders, providing liquidity to others.<\/li>\n\n\n\n
      • Dynamics of Changes.<\/strong>\u00a0The term implies a more dynamic perception of data: how quickly quotes change, how aggressive buyers or sellers are at different levels.<\/li>\n\n\n\n
      • Execution of Market Orders.<\/strong>\u00a0When a trader places a market order, it is executed at the best\u00a0prices<\/strong>\u00a0indicated precisely in the\u00a0Market Depth<\/strong>.<\/li>\n<\/ul>\n\n\n\n

        How do Price Depth and Market Depth differ?<\/h3>\n\n\n\n

        Although both concepts describe the same object, the difference lies in the plane of emphasis and the practical application of these emphases.<\/p>\n\n\n\n

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        • Semantic Nuance.<\/strong>\u00a0“Price Depth<\/strong>” is a look at static levels, a map of\u00a0prices<\/strong>. “Market Depth<\/strong>” is a look at the dynamic process of\u00a0price<\/strong>\u00a0formation in real time.<\/li>\n\n\n\n
        • Difference in Analysis.<\/strong>\u00a0Analyzing the first, a trader might say: “Large sell volume at a\u00a0price<\/strong>\u00a0of 100 rubles.” Analyzing the second: “Quotes are actively shifting downward under seller pressure.”<\/li>\n\n\n\n
        • Professional Jargon.<\/strong>\u00a0In the professional environment, especially among algorithmic traders, the term “Market Depth<\/strong>” is used more often, as their algorithms work precisely with the flow of changing quotes.<\/li>\n\n\n\n
        • For the Retail Investor.<\/strong>\u00a0For the average investor, this distinction is often insignificant, and both names are perceived as synonyms for the same element of the trading terminal interface.<\/li>\n\n\n\n
        • Conclusion.<\/strong>\u00a0It can be concluded that “Market Depth<\/strong>” is a narrower and more technical term, while “Price Depth<\/strong>” is more descriptive and general.<\/li>\n<\/ul>\n\n\n\n

          How to understand the Order Book?<\/h3>\n\n\n\n

          For a beginner, a table with numbers may seem complicated, but its structure is quite logical and standard for most trading platforms.<\/p>\n\n\n\n

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          • Basic Structure.<\/strong>\u00a0The table is usually divided into two main parts: the left (or top) for buy orders (Bid), and the right (or bottom) for sell orders (Ask). Orders within each group are sorted: in bids\u2014by descending\u00a0price<\/strong>, in asks\u2014by ascending\u00a0price<\/strong>.<\/li>\n\n\n\n
          • Columns.<\/strong>\u00a0As a rule, there are three key columns: “Price,” “Quantity” (volume in lots or units of the asset), and “Total” (total volume in monetary terms).<\/li>\n\n\n\n
          • Best Prices.<\/strong>\u00a0The most important row is in the middle, where the best (highest) bid\u00a0price<\/strong>\u00a0and the best (lowest) ask\u00a0price<\/strong>\u00a0meet. This point is the center of the current market confrontation.<\/li>\n\n\n\n
          • Color Coding.<\/strong>\u00a0In many terminals, buy orders are highlighted in green or blue, and sell orders in red. This allows for a quick visual assessment of the balance of power.<\/li>\n\n\n\n
          • First Steps.<\/strong>\u00a0A novice market participant should first simply observe how the table changes at the moments of news releases or during sharp movements to develop an intuitive understanding.<\/li>\n<\/ul>\n\n\n\n

            How to analyze the Order Book?<\/h3>\n\n\n\n

            Deep analysis of this tool allows one to identify non-obvious market signals and the intentions of large players.<\/p>\n\n\n\n

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            • Liquidity Assessment.<\/strong>\u00a0The first step is to look at the volumes at the best\u00a0prices<\/strong>\u00a0and several levels deeper. Large volumes mean high liquidity, allowing for trades with minimal slippage.<\/li>\n\n\n\n
            • Identifying Support and Resistance Levels.<\/strong>\u00a0Large accumulations of buy orders below the current\u00a0price<\/strong>\u00a0form a support zone. Similarly, large sell volumes above form resistance.<\/li>\n\n\n\n
            • Finding Stop-Losses.<\/strong>\u00a0Sometimes one can notice clusters of small orders far from the current\u00a0price<\/strong>. These may be stop-losses of retail traders, which can attract large participants to “collect” them.<\/li>\n\n\n\n
            • Pressure Analysis.<\/strong>\u00a0If at each level deeper into the buys the volumes are significantly larger than in the sells, this indicates buying pressure, and vice versa.<\/li>\n\n\n\n
            • Market Maker Activity.<\/strong>\u00a0Large players often place and quickly remove large orders to create an illusion of support or resistance and provoke movement in the desired direction.<\/li>\n<\/ul>\n\n\n\n

              How to interpret the Order Book?<\/h3>\n\n\n\n

              Interpretation goes beyond simple analysis of numbers and includes understanding the psychology and tactics of market participants.<\/p>\n\n\n\n