中文：

委比是金融市场中的一个重要指标，用于衡量市场买卖盘的强弱，是判断市场活跃度和趋势的重要依据。

委比的计算方法是：委比 = （买盘手数 - 卖盘手数） / （买盘手数 + 卖盘手数）× 100%。如果委比为正值，说明买盘力量较强，市场看好；如果委比为负值，说明卖盘力量较强，市场看淡。

委比在金融市场中的重要性主要体现在以下几个方面：

首先，委比可以反映市场的买卖力量对比，帮助投资者判断市场走势。如果委比持续为正值，说明买盘力量持续较强，市场看涨，投资者可以考虑买入；如果委比持续为负值，说明卖盘力量持续较强，市场看跌，投资者可以考虑卖出。

其次，委比的变化可以提前反映市场的变化趋势。如果委比出现大幅度的波动，说明买卖双方的力量对比正在发生变化，市场趋势可能发生变化。因此，投资者需要密切关注委比的变化趋势。

最后，委比还可以反映个股的活跃度。如果某只股票的委比非常高，说明该股票的买卖盘非常活跃，投资者对该股票的关注度较高。如果该股票的委比持续走高，说明该股票的买卖盘活跃度持续增加，该股票可能成为市场的热点股票。

总的来说，委比是金融市场中的一个重要指标，可以帮助投资者判断市场的买卖力量对比、变化趋势和活跃度。投资者需要密切关注委比的变化趋势，以便更好地把握市场机会。

英文：

The委比 is an important indicator in the financial market, used to measure the strength of market buy-sell orders and an important basis for judging market activity level and trends.

The calculation method of委比is: 委比 = (Buying orders - Selling orders) / (Buying orders + Selling orders) × 100%. If the委比is positive, it indicates that the buying power is relatively strong and the market is optimistic. If the委比is negative, it means that the selling power is relatively strong and the market is pessimistic.

The importance of the委比in the financial market mainly reflects in the following aspects:

Firstly, the委比can reflect the buy-sell force comparison in the market, helping investors to judge market trends. If the委比continues to be positive, it indicates that the buying power is continuously strong and the market is expected to rise, so investors may consider buying; if the委比continues to be negative, it means that the selling power is continuously strong and the market is expected to fall, so investors may consider selling.

Secondly, the change of委比can advance to reflect changes in market trends. If there is a significant fluctuation in委比, it means that the force comparison between buyers and sellers is changing and market trends may be changing. Therefore, investors need to pay close attention to the trend of changes in委比.

Finally, the委比can also reflect the activity level of individual stocks. If the委比of a certain stock is very high, it means that the buy-sell orders of this stock are very active and investors' attention on this stock is high. If the trend of this stock's委比continues to rise, it indicates that the activity level of this stock's buy-sell orders continues to increase, and this stock may become a hot stock in the market.

In general, the委比is an important indicator in the financial market, which can help investors judge market buy-sell force comparison, change trends and activity levels. Investors need to pay close attention to the trend of changes in委b in order to better grasp market opportunities.