Price channels
Encyclopedia
A price channel is a pair of parallel trend lines that form a chart pattern for a stock or commodity. Channels may be horizontal, ascending or descending. When prices pass through and stay through a trendline representing support
Support (technical analysis)
Support and resistance is a concept in technical analysis that the movement of the price of a security will tend to stop and reverse at certain predetermined price levels.- Support :...

 or resistance, the trend is said to be broken and there is a "breakout".

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