Chart patterns are formations created by the price movements of commodities and can signal potential trend reversals or continuations. Here are some important chart patterns to recognize in commodity trading: 

Head and Shoulders: This reversal pattern signals a change in trend direction. An inverse head and shoulders pattern indicates a potential bullish reversal, while a standard head and shoulders pattern suggests a bearish reversal. 

Triangles: Triangles (ascending, descending, and symmetrical) are consolidation patterns that indicate a period of indecision in the market. A breakout from a triangle pattern can signal the potential continuation or reversal of the prevailing trend. 

Flags and Pennants: Flags and pennants are continuation patterns that occur after strong price movements. A flag pattern resembles a rectangle, while a pennant has converging trendlines. Breakouts from these patterns can indicate the continuation of the prior trend. 

Double Tops and Bottoms: A double top pattern indicates a potential bearish reversal, forming after an uptrend, while a double bottom suggests a bullish reversal after a downtrend. These patterns occur when the price tests a resistance or support level twice without breaking through. 

Cup and Handle: This bullish continuation pattern resembles a cup with a handle and indicates a potential price breakout. The cup forms after a price decline, while the handle represents a consolidation period before the breakout. 

By identifying these chart patterns, traders can make informed decisions about potential market movements and optimize their trading strategies.