"FACT: Since the advent of decimalized trading in 2001, and high-frequency trading (HFT) algorithms, level II is largely worthless for today's retail day traders, because of the false sizes and market maker traps that these predatory experts use to show false size in L2. Liquidity traps and "dark pools" and SMART (vs ISLD/ARCA) order routing changes also render L2 based pattern trading largely worthless. As one colleague said, "Level 2 is a poker game nowadays". You can't follow the axe or other 10-year old tactics we used to use back in the old dot-com day trading era. Skip that."
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