What is an orderbook?

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An orderbook is a summary of orders which where cancelled by the brokerage firm.

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It's a summary of bid and ask market orders on the stock exchange.

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It's a summary of bid and ask limit orders on the stock exchange, which were not immediately executed, and thus remain on the book.

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A brokerage firm will collect all incoming orders from clients in a book, before the orders are transmitted to the exchange.

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