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Potential pitfalls of this volume trading strategy
First challenge: Creating a system which can understand written English well enough to read the news. Nothing short of IBM's Watson has proven very good at extracting meaning from unstructured text. Second challenge: By the time it reaches "the news", the big actors already know and have responded. Third challenge: It's not uncommon for a stock to drop on good news, or rise on bad, because the price had previously adjusted to an expectation of even better/worse news and is now correcting itself. Basic principle: It it was simple and obvious, everyone would already be doing it.