A triangle chart pattern used in technical analysis, where the top level increases and the bottom level decreases, moving farther and farther away from each other. When charted, the pattern looks like the reverse of a symmetrical triangle pattern. The expanding triangle is said to be a good indicator of a reversal pattern, and is usually analyzed when a security's price has been increasing to see if a decrease is likely to occur. also called broadening top and broadening formation.

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