# Best Bid & Ask ## Definition The **Best Bid & Ask** represents the **highest available buy price (Best Bid)** and the **lowest available sell price (Best Ask)** in the order book at any given moment. These two prices form the **immediate liquidity boundary** where buy and sell orders are most likely to be executed. #### **Key Concepts:** * **Best Bid:** The **highest price** a buyer is willing to pay for an asset. * **Best Ask:** The **lowest price** a seller is willing to accept for an asset. #### **Visualization:** * **Best Bid Line:** Displays the price level of the highest buy order over time. * **Best Ask Line:** Displays the price level of the lowest sell order over time. #### **Key Insights:** * **Price Boundaries:** The gap between these two lines forms the [**Bid-Ask Spread**](https://academy.hyblockcapital.com/indicators/orderbook/bid-ask-spread), indicating the cost of immediate execution. * **Liquidity Dynamics:** Changes in the best bid and ask prices reflect shifting supply and demand. * **Market Sentiment:** Persistent upward movement in the Best Bid suggests buying pressure, while downward movement in the Best Ask suggests selling pressure. The **Best Bid & Ask** lines provide a **real-time snapshot of market liquidity boundaries**, helping traders track price discovery, assess market efficiency, and identify immediate buying and selling pressures. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://academy.hyblockcapital.com/indicators/orderbook/best-bid-and-ask.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.