RSI (Relative Strength Index) is intended to chart the current and historical strength or weakness of a financial instrument based on the closing prices of a trading period. The RSI is most typically used on 14 historical data points, measured on a scale from 0-100, with high and low levels marked at 70 and 30, respectively. This indicator was developed by J. Welles Wilder and published on 1978. It has become one of the most popular oscillator indices. Using RSI will assist you in trading the EUR/CAD pair.