# Oscillators

> "Oscillators tell you when to act, not which direction to trade."  Unknown

Oscillators fluctuate above and below a centerline or within bounded ranges. Useful for identifying overbought/oversold conditions, momentum shifts, and divergences. Best in ranging markets; trend-following indicators work better in trending markets.

| Indicator | Full Name | Description |
| :--- | :--- | :--- |
| AC | Acceleration Oscillator | Second derivative of AO. Measures acceleration of market driving force. |
| [AO](ao/Ao.md) | Awesome Oscillator | 5-period SMA minus 34-period SMA of bar midpoint. Bill Williams creation. |
| [APO](apo/Apo.md) | Absolute Price Oscillator | Raw currency difference between fast and slow EMAs. Unbounded. |
| BBB | Bollinger %B | Position within Bollinger Bands. 0=lower band, 1=upper band. |
| BBS | Bollinger Band Squeeze | BB width < KC width indicates consolidation. Breakout imminent. |
| CFO | Chande Forecast Oscillator | Percentage difference between price and linear regression forecast. |
| DPO | Detrended Price Oscillator | Removes trend via displaced SMA. Reveals cycles. |
| FISHER | Fisher Transform | Converts prices to Gaussian distribution. Sharp reversals. |
| INERTIA | Inertia | Trend strength from distance to linear regression line. |
| KDJ | KDJ Indicator | Enhanced Stochastic. J = 3K - 2D provides leading signal. |
| PGO | Pretty Good Oscillator | Distance from SMA normalized by ATR. Units: ATR multiples. |
| SMI | Stochastic Momentum Index | Distance from range midpoint. More sensitive than classic Stochastic. |
| STOCH | Stochastic Oscillator | Close position within N-period high-low range. Classic overbought/oversold. |
| STOCHF | Stochastic Fast | Unsmoothed Stochastic. Faster but noisier. |
| STOCHRSI | Stochastic RSI | Stochastic applied to RSI. More sensitive than either alone. |
| TRIX | Triple Exponential Average | ROC of triple EMA. Filters noise through three smoothings. |
| [TTM_WAVE](ttm_wave/TtmWave.md) | TTM Wave | Fibonacci-period MACD composite (Waves A/B/C). John Carter. |
| [ULTOSC](ultosc/Ultosc.md) | Ultimate Oscillator | Multi-timeframe oscillator. Combines 7, 14, 28 period buying pressure. |
| WILLR | Williams %R | Inverse Stochastic. -100 to 0 range. Overbought/oversold. |