What is Order Book Depth?
How much size sits on bids and offers near the mid price, showing how much you can trade without large impact.
big order eats 3 levels
Order book depth measures…
Write it in your own words in the app.
In real work
Check order book depth before sizing the hedge; the top of book alone looked thicker than it was.
In the illustration
A large order drills down through three levels and the price marker moves with each.
Measure the order book depth in your market app within five cents of the mid: how many shares I can buy before the price moves past 0.50.
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