One of the shortcomings of moving averages is that they lag behind the market and therefore may not necessarily serve as a sign of trend change. To address this issue, use5or10The shorter period moving average of days will be lower than40or200The moving average of the day better reflects recent price trends. Alternatively, the moving average can also be used by combining two different time span averages. Regardless of use5and20The moving average of the day, or40and200天的移动平均线,买入信号通常在较短期平均线向上穿过较长期平均线时被查觉。与此相反,卖出信号会在较短期平均线向下穿过较长周期平均线时被提示。