What is Market Depth? What is 20 Depth functionality? How to use it?

What is Market Depth? What is 20 Depth functionality? How to use it?

  1. Market depth is expressed as the list of limit orders placed at different price levels for a particular security.
  2. It consists of 2 parts- Bid and Asks where Bid shows the number of Buy orders placed at a price level and Ask shows the number of Sell orders placed at a particular price level.
  3. 20 Market depth functionality provides the list of the best 20 Bids and Asks.