Coupa Software (COUP) has formed a large "broadening pattern" ahead of its earnings report due out after the close this Cyber Monday. The "broadening pattern" dates back to the 1910's and was believed to be a sign that pool operators were active in a stock by running it up and down to generate activity and attract attention from investors. Chart watchers quickly learned that the pattern could be either a continuation pattern where prices continued the trend that was in force before the pattern or it was a reversal pattern and the stock reversed direction.
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