Level 1 market data shows the current best bid/offer, while Level 2 market data will show the full depth of book.
What is the difference between Level 1 and Level 2 market data?
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How many market depth levels do you provide?
How can I see a Market Depth window in TWS?
Do you provide depth of book (Level 2) market data on the CSE market?
Can I change the sorting of the columns in the Market Depth Trader?