1) short-term moving average. 3-day moving average: this line is obviously distorted and extremely irregular with the fluctuation of the exchange rate on that day, so it is difficult to find its regularity. 5-day moving average: As there are 5 trading days every week, short-term customers pay attention to whether this line can be worn up or down. The 10/0 daily line is a common reference line. 10 daily average: this line is widely used, which can truly reflect the change and trend of the average cost of exchange rate and can be used as a reference for short-term trading. 15 moving average: commonly known as the half-moon line, few investors use this line.

(2) Medium-term moving average. Line 25: This line is efficient, and some investors and institutions in Europe prefer to use it. 30-day line: This moving average is used in combination with other averages, so that investors can refer to the trends of exchange rate and short-term, medium-term and long-term averages on that day and understand the correlation between them. Oriental investors prefer to use this line. Day 37: It is inconvenient to calculate and recheck, and it can only be used as a reference. 8-week line and 10-week line: American investors and institutions prefer to use these two moving averages to explain the trend of medium and long-term exchange rate changes. The 60-day line and the 75-day line: commonly known as the quarterly line, these two lines can reflect the characteristics of the moving average, with reasonable sampling, and can truly and reliably reflect the trend of the exchange rate.

(3) Long-term average. Mainly for long-term operation reference, it is divided into 150 daily line (semi-annual line), 200 daily line and 295 daily line (annual line). Even the longest moving average exists, but considering that the time is too long, the sample is too large and the effectiveness is too low, it loses its reference significance.