CALL: (250) 374-6858     EMAIL: [javascript protected email address]
Rapid Cool on Facebook Find us on Facebook

Relative Strength Index RSI Indicator Explained With Formula

relative strength index definition

A formula will need at least 250 data points to replicate our RSI numbers. According to a traditional relative strength index meaning, all values above 70 may indicate that an asset is being overbought and may be ready for a trend reversal or pullback. On the other hand, an RSI value below 30 may signal that the asset is being oversold and undervalued. A versatile oscillator, the RSI has survived the time test and keeps its leading position among other technical indicators.

  • Because the MACD uses moving averages, it can be used to qualify trading signals generated by the RSI indicator.
  • The relative strength index (RSI) is one of the most popular technical analysis indicators.
  • For example, many traders buy on a dip when negative momentum is decelerating and sell on a rally when positive momentum is decelerating.
  • The levels can be adjusted, however, to better fit the price movement of a specific security a trader is watching.
  • 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.
  • The Relative Strength Index, or RSI, is a technical indicator measuring the strength and momentum behind a stock’s recent price moves.

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 relative strength index definition or undervalued conditions in the price of that security. The Relative Strength Index or RSI is one of the most common indicators in Technical Analysis, or TA for short.

Calculating Risk on Vertical Options Spreads

The RSI can do more than point to overbought and oversold securities. It can also indicate securities that may be primed for a trend reversal or corrective pullback in price. Traditionally, an RSI reading of 70 or above indicates an overbought situation. The formula divides the average gain the price has had over 14 periods by the absolute value of average loss.

Traders typically interpret the RSI line moving below the overbought line or above the oversold line as a signal to buy or sell. 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.

RSI trading strategies

For instance, the moving average convergence divergence and moving average crossovers both allow traders to verify RSI indicators. The relative strength index (RSI) is a popular momentum oscillator​​ that can be used to determine the future direction of a market. Traders can use the RSI to gauge whether momentum is accelerating or decelerating. It can also be used to evaluate whether a security is overbought or oversold. The RSI is a popular technical analysis tool and can help traders identify and generate trading opportunities in the markets. The RSI can be used to help traders find overbought or oversold situations, find divergences, validate trends and trend reversals or help them predict the price behaviour of a given instrument.

These bearish divergences may have warned of a short-term pullback, but there was clearly no major trend reversal. The RSI compares bullish and bearish price momentum and displays the results in an oscillator placed beneath a price chart. Like most technical indicators, its signals are most reliable when they conform to the long-term trend. The RSI was designed to indicate whether a security is overbought or oversold in relation to recent price levels. It’s calculated using average price gains and losses over a given period of time.


Spread bets and CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. 71% of retail investor accounts lose money when spread betting and/or trading CFDs with this provider. You should consider whether you understand how spread bets and CFDs work and whether you can afford to take the high risk of losing your money. The Relative Strength Index (RSI) is a momentum oscillator used to gauge the current overbought or oversold condition of a financial instrument on a scale of 0 to 100. Prices are considered oversold when the RSI falls under 30 and overbought when RSI rises above the 70.

Call Now