The Coppock Curve is a long-term momentum indicator developed in 1962 by economist Edwin Coppock to identify major market bottoms, originally applied to the S&P 500. It functions as a trend-following oscillator designed to signal the end of bear markets and the start of new bull markets. The indicator calculates a weighted moving average (WMA) of the sum of two rates of change (ROC) over 11 and 14 months, smoothing out short-term market fluctuations. This approach filters noise and provides clear, binary buy signals when the curve rises from below zero. The Coppock Curve is primarily used for long-term investing and retirement allocation strategies, helping investors avoid premature entries during downtrends by confirming momentum shifts from negative to positive. It is not intended for day trading, shorting, or identifying market tops. The indicator is commonly applied to indices such as the S&P 500 and NASDAQ.