The bear flag pattern is a reliable continuation pattern that is often seen in downtrends. It is formed when there is a sharp sell-off followed by a temporary pause. This pattern is not specific to any one commodity and can be found in various markets, including forex, stocks, and commodities. Some examples of commodities that have formed bear flag patterns in the past include gold, silver, oil, and natural gas. However, it is important to note that past performance is not indicative of future results, and traders should always conduct their own analysis before making any trading decisions.