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学习笔记丨RSI使用技巧

  • 2026-03-24 19:59:52
学习笔记丨RSI使用技巧
最近沉迷技术指标，既然学了，肯定不能只学一个，多个指标共同参考才有意义，今天再来学习下也很有名的RSI指标。
一、什么是RSI指标
RSI（Relative Strength Index）相对强弱指标，主要衡量价格涨跌力度和超买超卖的情况，在震荡行情相对有效。
二、RSI指标怎么算
从计算公式来看，通过计算一段时间内涨幅vs跌幅的相对强度，得出0~100的数值，反映多空力量对比。
1、先算每日涨幅 U 和每日跌幅 D
当日上涨：U = 今日收盘价 - 昨日收盘价，D = 0
当日下跌：D = 昨日收盘价 - 今日收盘价，U = 0
2、计算一定周期内平均涨幅 AU、平均跌幅 AD（一般常用14日）
AU = 14日所有U之和/14
AD = 14日所有D之和/14
3、计算相对强度 RS
RS = AU/AD
4、计算RSI
三、RSI指标怎么用
1、超买超卖
从公式显然可以知道，涨幅（AU）越大，RSI就越大，反之跌幅（AD）最大，RSI就越小。
一般来说，从范围来看，RSI小于20可以认为到了超卖区，大于80可以认为到了超卖区。
2、顶底背离
当价格创新高，但是RSI值没有创新高时，可能是见顶信号；同理，当价格创新低，但是RSI值没有创新低时，可能是见底信号。
3、快慢交叉
图形上一般都有长、短两条不同周期的RSI，即快速RSI和慢速RSI，快速RSI在20以下水平由下往上穿过慢速RSI，是买入信号；快速RSI在80以上的水平由上往下交叉穿过RSI，是卖出信号。
4、主要缺点
中间值的RSI尽量不要看，容易被骗炮，在单边行情中，RSI的参考价值也不是很大。
四、总结
依然是一个根据历史数据计算的指标，当然绝大部分的技术指标都是如此。还是那句话，所有的指标都是个参考，多个指标多个参考依据，不要只参考单一指标做交易，时间长了必亏钱。
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  1. CONNECT:[ UseTime:0.000994s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001563s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000662s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000614s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001264s ]
  6. SELECT * FROM `set` [ RunTime:0.000633s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001429s ]
  8. SELECT * FROM `article` WHERE `id` = 477254 LIMIT 1 [ RunTime:0.001033s ]
  9. UPDATE `article` SET `lasttime` = 1774393444 WHERE `id` = 477254 [ RunTime:0.047160s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.008266s ]
  11. SELECT * FROM `article` WHERE `id` < 477254 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000658s ]
  12. SELECT * FROM `article` WHERE `id` > 477254 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000461s ]
  13. SELECT * FROM `article` WHERE `id` < 477254 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002181s ]
  14. SELECT * FROM `article` WHERE `id` < 477254 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000639s ]
  15. SELECT * FROM `article` WHERE `id` < 477254 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000598s ]
0.219334s