At trend reversals, trading volume usually spikes as there is a large - scale change in market sentiment. Volatility increases significantly, and the Fear and Greed Index may show extreme values. For example, at the start of a bearish reversal, the index may shift from extreme greed to fear rapidly. Investors can use moving averages in combination with trading volume. If the price breaks through a key moving average with high volume, it may signal a trend change. Monitoring the Fear and Greed Index can also provide early warnings. By setting stop - loss and take - profit levels in advance, investors can limit losses during market reversals.