【中文版】

仓差为负是指持仓量减少，表明资金正在流出市场。具体来说，如果一个投资者在期货市场卖出开仓10手，后来又买入平仓10手，那么他的持仓量就变成了0手，仓差就是-10手。这意味着他的交易行为实际上是卖出和买入相抵消，没有产生任何净头寸。

当仓差为负时，说明市场上的投资者正在减少他们的净头寸，这可能是由于他们对市场的看法发生了改变，或者他们正在调整自己的投资组合。在这种情况下，仓差为负可以作为市场趋势逆转的一个信号。

然而，仓差为负并不一定意味着市场将会下跌。投资者应该结合其他技术指标和市场消息来分析市场趋势。例如，如果市场在仓差为负的情况下继续上涨，这可能意味着市场已经形成了强大的支撑，或者投资者正在进行反向操作来制造假象。

总之，仓差为负是市场趋势的一个重要指标，但投资者需要综合考虑其他因素来做出正确的投资决策。

【英文版】

When the position difference is negative, it means that the market is experiencing a decrease in the number of open positions. This indicates that investors are reducing their net positions, which may be due to a change in their market view or an adjustment to their investment portfolios. In this case, a negative position difference can serve as a signal for a market trend reversal.

However, a negative position difference does not necessarily mean that the market will fall. Investors should combine other technical indicators and market news to analyze market trends. For example, if the market continues to rise despite a negative position difference, it may mean that the market has formed strong support or investors are taking countermeasures to create a false impression.

In summary, a negative position difference is an important indicator of market trends, but investors need to consider other factors to make accurate investment decisions.