First of all, we need to understand the meaning of these two forms. They are all chart forms in technical analysis, which are used to predict the future trend of asset prices. The trumpet shape is usually formed by two outward inclined trend lines, indicating that the price fluctuation is increasing, while the diamond shape is a more complicated shape, which combines the expansion and contraction shapes, and usually includes an upward inclined trend line, a downward inclined trend line and two horizontal trend lines connecting these trend lines.
However, although these two forms are more common in the stock and foreign exchange markets, they are less common in the futures market. This is mainly due to the characteristics of the futures market. The futures market is influenced by many factors, including the supply and demand of commodities, storage costs, interest rates, exchange rates and so on. These factors may lead to the fluctuation of futures prices, making the price trend more difficult to predict, so the probability of trumpet and diamond shape is reduced.
In addition, traders in the futures market usually prefer to use fundamental analysis to predict price trends rather than technical analysis. Fundamental analysis focuses on the basic factors of the market, such as supply and demand, while technical analysis focuses more on the historical trend of prices. This also reduces the appearance of trumpet-shaped and diamond-shaped forms in the futures market.
To sum up, although trumpet-shaped and diamond-shaped forms often appear in the stock and foreign exchange markets, they are relatively rare in the futures market. This is mainly due to the characteristics of the futures market and the analytical habits of traders. But this does not mean that these two forms will not appear in the futures market at all, but the frequency of their appearance is relatively low.