"Doing" with money and intention is the main force. Usually there are many main participants in a contract, and these main participants will also compete with each other, especially in the futures market. At present, A shares can only be long and cannot be short. You are optimistic about a stock and keep buying it, forcing it to keep rising. Aren't you the main force? Then there are many small funds that agree with you and buy with you. At this time, you start to sell, but small funds are still buying. The desire to buy three small funds is greater than your desire to sell, and the stock is still rising. At this time, do you think we should call them the main force or you the main force? So don't dwell on the concept of main force. You can directly call your capital main force, saying that the main force has begun to retreat, or that there are differences between the main forces. The market is always an incomplete market, and people can't clearly judge the price of a stock or futures target, so the trading market is valuable. Otherwise, it is all bullish. Who will sell it to you? Right?