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by gruez 1717 days ago
It's not either-or. You're right you're mostly trading with a market internalizer, which is pocketing the spread (ie. bid: 10.00, ask: 10.05) but isn't really making money on price movements. However, you're still against hedge funds/banks for medium/long term price movements (eg. you buying a stock after they pumped it, and selling after they dumped it).