Channel - uptrend A channel in the market is two parallel lines of support and resistance , which are formed by the price. This is comparable to a rectangle , only its support and resistance levels are horizontal; The channel almost always slopes up or down. As with a rectangle , there must be at least two peaks forming a resistance line and there must be at least two troughs forming a support line. Uptrending channel sell signal Channel - Uptrend A level breakout occurs when price breaks out and breaks above the resistance line or below the support line. For an ascending channel , a sell signal is generated when the price breaks the ascending support line downward. DownTrending Channel Buy Signal Channel - Downtrend A level breakout occurs when price breaks out and breaks above the resistance line or below the support line. For a downtrend channel , a buy signal is generated when the price breaks up the upward resistance line. Internal Channel Buy and Sell Signals Channel - Uptrend Bulkowski (2005) suggests buying when price reaches support and selling when price reaches resistance in an upward channel; nevertheless, he suggests not to open a short position at the resistance level and buy to cover the support level in an upward channel, but to do so only in a downward channel ; it also suggests exiting trades that close above resistance or below support, which contradicts the direction in which the trader expects prices to move in order for the trade to be profitable. Price benchmarks Price Channel Uptrending Chart Example The above EUR / USD chart shows an ascending channel with support.a trend line formed by three bottoms and a resistance trend line formed by three peaks. A sell signal is given when the price closes for uptrend support line. Price Channel Downtrending Chart Example An example of a descending channel is shown in the GBP / USD chart. The downtrend resistance line is defined by three peaks, and the downtrend support line is defined by three troughs. As soon as the price breaks above the downtrend resistance line, a new uptrend begins.