The Kaufman Efficiency Ratio (KER) is an indicator designed to measure the efficiency of price movement between two points by quantifying trend clarity. It calculates a normalized value ranging from 0 (indicating pure noise) to 1 (indicating a perfect trend), thereby distinguishing trending market conditions from sideways or choppy price action. KER is suitable for use across multiple asset classes including forex, cryptocurrencies, indices, and equities.

Key features include a modular input manager supporting multi-timeframe data, lightweight real-time calculation without smoothing lag, and compatibility with existing trading system architectures. The indicator is useful for validating trend direction before executing trades, filtering out noise to avoid inefficient entries, detecting market regimes when combined with volatility-aware overlays, and serving as a core metric in breakout, momentum, or bias-based strategies.

KER provides a clear, unambiguous score reflecting directional intent versus volatility, making it applicable for adaptive overlays, regime filters, and signal gating in trading strategies.