relative strength index definition

We have not established any official presence on Line messaging platform. Therefore, any accounts claiming to represent IG International on Line are unauthorized and should be considered as fake. Please ensure you understand how this product works and whether you can afford to take the high risk of losing money. A positive reversal forms when RSI forges a lower low, and the security forms a higher low. This lower low is not at oversold levels but is usually between 30 and 50.

relative strength index definition

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. As the chart’s subsequent price action reveals, this bullish divergence correctly forecasted an upcoming trend change, from downtrend to uptrend. Bullish and bearish markets play a big role in how the RSI behaves.


All such information is provided solely for convenience purposes only and all users thereof should be guided accordingly. After you determine the value of the RS, you can apply the result in the first formula. A buy signal occurs when the RSI falls to an oversold level (30 or less) and then rises back above 30. However, RSI dropped below 30, signaling that there might be no more sellers left in the market and that the move could be over.

  • Additionally, the RSI is likely to generate false signals and should thus be used in conjunction with additional technical analysis tools rather than as a standalone source of trading signals.
  • It provides important information that traders can use prior to entering a position.
  • We also saw that it is always better to use one or more indicator to help us in making more educated guesses in the market.
  • The rate of change of price action can indicate if momentum is accelerating or decelerating.
  • High and low levels—80 and 20, or 90 and 10—occur less frequently but indicate stronger momentum.
  • On the flip side, RSI tends to fluctuate between 10 and 60 in a bear market (downtrend) with the zone acting as resistance.

Traders can draw trendlines on the RSI chart, just as they would on price charts, to identify support and resistance levels or detect potential trend reversals. It is also frequently watched for divergence signals of possible upcoming trend changes. Wilder also considered failure swings as strong indications of an impending reversal. Failure swings are independent of price action, focusing solely on RSI for signals and ignoring the concept of divergences. A bullish failure swing forms when RSI moves below 30 (oversold), bounces above 30, pulls back, holds above 30 and then breaks its prior high. It is basically a move to oversold levels and then a higher low above oversold levels.

The formula is RSI = 100 – 100/(1+RS).

A reading on the indicator below 30 can also be used to plan the exit of a successful short trade. Unfortunately, accurate reversal signals are rare and can be challenging to separate from false alarms. The primary function of the RSI is to demonstrate overbought and oversold conditions.

A former Navy mechanic, Wilder would later go on to a career as a mechanical engineer. After a few years of trading commodities, Wilder focused his efforts on the study of technical analysis. This work featured the debut of his new momentum oscillator, the Relative Strength Index, better known as RSI. In a hypothetical example, if the RSI for ETH breaks below 40 for the first time in an existing uptrend, then the Set automatically rebalances into 100% USDC in anticipation for an imminent sell off. Alternatively, you may want to buy on a breakout when positive momentum is accelerating, and sell on a breakdown when negative momentum is accelerating. The RSI will provide enough information to determine if the price of an asset is experiencing negative or positive momentum and whether that momentum is accelerating or decelerating.

Tips for Traders And Common Mistakes

Placing RSI directly on top of the price plot accentuates the movements relative to price action of the underlying security. You can apply “advanced options” to smooth the indicator with a moving average or add a horizontal line to mark overbought or oversold levels. The relative strength index (RSI) is a technical indicator used in the analysis of financial markets. It is intended to chart the current and historical strength or weakness of a stock or market based on the closing prices of a recent trading period.

What is the meaning of relative strength index?

The relative strength index (RSI) is a momentum indicator used in technical analysis. RSI measures the speed and magnitude of a security's recent price changes to evaluate overvalued or undervalued conditions in the price of that security. The RSI is displayed as an oscillator (a line graph) on a scale of zero to 100.

Otherwise, in a non-Morris Modified RSI, these averages are cumulative. RSI can be used to construct many different trend trading strategies. One strategy is buying / selling on divergences at extreme RSI values which indicates overbought / oversold levels. Another strategy is buying / selling when the RSI crosses past or close to the midline which can indicate the start of a trend. Additionally, RSI can be used in combination with other indicators such as moving averages to output more accurate signals in both choppy and trending markets.

First, Cardwell noticed that uptrends generally traded between RSI 40 and 80, while downtrends usually traded between RSI 60 and 20. Cardwell observed when securities change from uptrend to downtrend and vice versa, the RSI will undergo a “range shift.” The RSI is most typically used on a 14-day timeframe, measured on a scale from 0 to 100, with high and low levels marked at 70 and 30, respectively. Short or longer timeframes are used for alternately shorter or longer outlooks.

Divergences occur when the price moves in the opposite direction of the RSI, i.e., a chart might indicate a change in momentum before a corresponding price change. In finance, a rebound occurs when stock relative strength index definition prices begin increasing after a period of decline. If you’ve been following recent price changes for that sweater you’re eyeing, you may do a better job of predicting how much it will cost in the future.

Explanation of the Mathematical Formula

The relative strength index (RSI) is a technical indicator that measures the momentum of a security based on its closing prices. Once calculated, the RSI is displayed as an oscillator, which is a line graph between two extreme values. To compute the average gain and average loss, one must first calculate the difference in closing prices between consecutive days. The Relative Strength Index (RSI) is one of the most popular and widely used momentum oscillators. It was originally developed by the famed mechanical engineer turned technical analyst, J.

relative strength index definition

Chart 7 shows Research in Motion (RIMM) with 10-day RSI forming a bullish failure swing. Readings below 30 and 70 indicate oversold or overbought conditions, and present traders with a buy or sell signal they can take action based on. However, some traders prefer to miss out on trying to catch tops or bottoms using the vanilla RSI strategy and often opt to take a position based on a cross of the midline on the RSI. In the following sample, the RSI midline reading of 50 can be seen acting as a buy or sell signal depending on which direction the price passes through the midline from. The example also depicts the midline reading acting as resistance and support at times.

Strong uptrends can signal multiple bearish divergences before a material reversal may set in and vice versa on strong downtrends. Overbought describes a period with a significant and consistent upward movement in price over time without much pullback. It is a term used when an asset is believed to trade at a price beyond its intrinsic value, meaning it’s priced above where it should be according to technical and fundamental indicators.

  • Created by an analyst named James Welles Wilder, Jr., in 1978, RSI measures how quickly and drastically an asset’s price has changed recently.
  • PrimeXBT Trading Services LLC is incorporated in St. Vincent and the Grenadines as an operating subsidiary within the PrimeXBT group of companies.
  • Likewise, when prices dropped rapidly and therefore momentum was low enough, the financial instrument would at some point be considered oversold presenting a possible buying opportunity.
  • Traders typically interpret the RSI line moving below the overbought line or above the oversold line as a signal to buy or sell.
  • It does this by comparing the divergence of two EMAs, or exponential moving averages, one a 12-period, and one a 26-period.
  • In Technical Analysis for the Trading Professional, Constance Brown suggests that oscillators do not travel between 0 and 100.