Why Use Level II? Level II quotes can tell you
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Level II quotes can tell you a lot about what is happening with a given stock:
You can tell what kind of buying is taking place - retail or institutional - by looking at the type of market participants involved. Large institutions do not use the same market makers as retail traders.
If you look at ECN order sizes for irregularities, you can tell when institutional players are trying to keep the buying quiet (which can mean a buyout or accumulation is taking place). We'll take a look at how you can detect similar irregularities below.
By trading with the ax when the price is trending, you can greatly increase your odds of a successful trade. Remember, the ax provides liquidity, but its traders are out there to make a profit just like anyone else.
By looking for trades that take place in between the bid and ask, you can tell when a strong trend is about to come to an end. This is because these trades are often placed by large traders who take a small loss in order to make sure that they get out of the stock in time.
Learn How to Read Level 2 : Trading Terminology & Definitions
Level 2 Market Data - Easy Explanation