If you are a trader who uses technical analysis, the Relative Vigor Index (RVI) is a powerful tool that can help you confirm trends and identify potential trend reversals. Developed by John Ehlers, the RVI measures the strength of a trend by comparing the average price change of up periods to the average price change of down periods over a specified period. This results in a line that oscillates around a centerline, which can be used to confirm a trend or identify overbought/oversold levels. In this article, we will take a closer look at the RVI, including how it works, how to interpret it, and how traders can use it in their trading strategies.