Fast is mainly reflected in not only buying quickly, but also selling quickly. The opportunities in the investment market are fleeting, which requires investment experts to possess keen insight, good psychological qualities, and accumulated experience in order to stay ahead in the rapidly changing market. As the saying goes, "The first move is the first move, and the second move will suffer." Therefore, investors have a quick understanding of stock market policies, react quickly to news, think quickly, react quickly to market public expectations, and make tactical arrangements. They should buy quickly, sell quickly, and never hesitate to buy and sell.

（2） Accurate

Opportunities in the stock market are difficult to seize, and even those with strong operational skills cannot see every opportunity clearly. For the vast majority of investors, it is even more difficult to grasp the rhythm of the rebound. Therefore, a core requirement in tactics is to "only focus on high certainty opportunities". Everyone has different abilities. Among the opportunities we discover, there are definitely some that we feel are more likely to grasp, while others are somewhat ambiguous. In operation, we must distinguish the size of the risks involved and never take action easily when we are unsure. To prevent one's funds from being trapped, because in the stock market, once funds lose liquidity, it means completely losing the initiative. Therefore, investors must learn to restrain, endure, and analyze calmly, focusing on quality over quantity, improving operational accuracy, and seizing several major market trends. This is not only beneficial for the safety of funds, but also less likely to disrupt the mindset of operations, thereby affecting subsequent operations.

Hardship is mainly for oneself, with the core requirements being "short positions" and "stop losses". According to statistics, 95% of the profits made by famous speculators in the world come from capturing several major market trends, while only 5% of their wealth comes from buying and selling on a regular basis. Soros, the world's super speculator, deeply summarized his speculative experience and said, "The key to successful speculation is not how many times you judge correctly, but how many times you judge correctly. The key is to give your all when you judge correctly

Therefore, in band operations, the essence of offensive and defensive strategies lies in seizing opportunities, fast in and out, and being brave enough to stop losses.