1. The first method is to divide the difference between the highest price and the lowest price of the current period by the closing price of the previous period, and then express the value as a percentage. Now, for example. Take the magnitude of earthquakes every day as an example. The highest price of the day MINUS the lowest price, divided by yesterday's closing price, and then converted into a percentage can be calculated.

The second method is to add the maximum increase and the maximum decrease. For example, there is a stock today that closed at 10 yesterday and rose to 1 1 today, up by10%; The lowest is over 9, falling 10%, and the amplitude is 20% at this time. Although the expression is different, the calculation result is the same. For example, there is a stock today that closed at 10 yesterday. Today, the highest price rose to 1 1, up 10%, and the lowest price reached 9, down 10%. In this example, the amplitude is 20%, and the specific calculation formula is as follows: the highest price of the day-the lowest price of the day)/yesterday's closing price × 100% = amplitude or: the highest amplitude-the lowest amplitude = amplitude.