The Schaff Trend Cycle (STC) indicator, developed by Doug Schaff, is a technical analysis tool designed to identify market trends and reversals quickly and accurately. It combines exponential moving averages (EMAs) with stochastic calculations to provide earlier and more reliable signals than traditional lagging indicators like MACD or the Stochastic Oscillator. This approach enhances trend detection and market analysis.

Key features include early trend detection through combined EMAs and stochastic methods, customizable parameters such as length, fast and slow moving average lengths, moving average type (e.g., EMA, SMA), and smoothing factor to tailor the indicator to different trading strategies. The indicator offers visual alerts with dynamic color changes to indicate bullish or bearish trends and includes built-in overbought and oversold levels (25 and 75) to help identify potential market turning points.

Outputs provided are the primary STC value representing trend direction and strength, along with separate signals highlighting bullish (STCBull) and bearish (STCBear) conditions. The STC indicator is suitable for programmatic use in automated trading systems.