Meaning of RSI in English
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Relative Strength Index (RSI)
The Relative Strength Index (RSI) is one of the most popular and widely used momentum oscillators. It Rsi指标最早是被用于期货交易中 was originally developed by the famed mechanical engineer turned technical analyst, Rsi指标最早是被用于期货交易中 J. Welles Wilder. The RSI measures both the speed and rate of change in price movements within the market.
The values of the RSI oscillator, typically measured over a 14-day period, fluctuate between zero and 100. The Relative Strength Index indicates oversold market conditions when below 30 and overbought market conditions when above Rsi指标最早是被用于期货交易中 70. It is frequently used by swing traders. They look Rsi指标最早是被用于期货交易中 for signals of waning or strengthening momentum in short to intermediate term price movements within a market. Overbought or oversold conditions often immediately precede short-term trend changes that present trading opportunities.
RSI Excel Model Template
Calculating the RSI
Calculation of the RSI, to be done thoroughly, requires a great deal of highly technical and complex explanations. To fully understand how the calculation is accomplished, traders and analysts should read Wilder’s own explanation. It is presented in his 1978 book, New Concepts in Technical Trading Systems.
However, the index can be broken down into a (fairly) simple formula:
RSI = 100 – [100 / (1 + (Average of Upward Price Change / Average of Downward Price Change)]
The Relative Strength Index – What to Watch Out For
Traditionally, the Relative Strength Index is considered to signal overbought conditions when above 70 and oversold conditions when under 30. The levels can be adjusted, however, Rsi指标最早是被用于期货交易中 to better fit the price movement of a specific security a trader is watching. If, for example, a security’s RSI consistently hits above the 70 mark or below the 30 mark without correctly forecasting a change in price trend, a trader might adjust the upper end to 80 and/or the lower end to 20 to get more reliable trading signals.
Traders should keep in mind that during periods of very strong trends, a security’s price may continue to rise for a long time after an oscillator such as the RSI signals “overbought” conditions in the Rsi指标最早是被用于期货交易中 market. The same caveat applies to extended downtrend price movement that Rsi指标最早是被用于期货交易中 may occur well after an RSI indication of a market being “oversold”.
“Normal” RSI Values and the RSI as a Divergence Indicator
Bullish and bearish markets play a big role in how the RSI behaves. During a bull market, RSI values normally Rsi指标最早是被用于期货交易中 sit in the 40 to 90 range, with the 40-50 range seen as support. In a bear market, the reading typically Rsi指标最早是被用于期货交易中 stays within the 10 to 60 range, with the 50-60 zone signaling resistance. These ranges are typical but may vary based Rsi指标最早是被用于期货交易中 on the settings for the index, as well as the strength of the underlying market trend for any given security.
In addition to the basic 70/80 or 30/20 readings, traders also watch Rsi指标最早是被用于期货交易中 for divergence between price movement and the value of the RSI. When price hits a new low or high that isn’t supported by a corresponding new low or high in the RSI Rsi指标最早是被用于期货交易中 reading, this can indicate an impending price reversal in the market.
An Example of RSI Divergence
The chart below shows an example of divergence between price and the Relative Strength Index. Near the center of the chart, as marked by a thick black Rsi指标最早是被用于期货交易中 line, the price of the security continues to decline, making a Rsi指标最早是被用于期货交易中 new low just before a market reversal to the upside begins around the end of July. However, the RSI (plotted in the lower chart window) does not follow suit and make a corresponding new low. Instead, it has already begun to turn to the upside near the beginning of June. The RSI is exhibiting a bullish divergence from price. As the chart’s subsequent price action reveals, this bullish divergence correctly forecasted an upcoming trend change, from downtrend to uptrend.
The Relative Strength Index is among the most popular technical indicators, helping traders determine potentially good buy entry points (when a security is oversold) and sell points (Rsi指标最早是被用于期货交易中 when a security is overbought). It is also frequently watched for divergence signals of possible upcoming trend changes.
Thank you for reading CFI’s guide on Relative Strength Index (RSI). To learn more about career paths and how to break into banking, please see these additional resources:
公式的目的是为了克服动能指标的构建过程中存在的两个问题： 1.不规则变动 2.为了比较的需要而设立固定的交易区域 不规则变动是由股价剧烈的运动引起的，但在计算中逐渐消失，很多情况下股价在短时间内剧烈的下跌或上升可能造成动能曲线的突然改变,RSI试图消除这种扭曲现象。 RSI公式不仅能够提供这种平滑特征，而且可以产生一个能够在0-100之间固定区域变动的指标。 怀尔德推荐的默认时间跨度是14天，他论证了应用月周期28日的一半是有效的。
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