Free MT4 Oscillator Indicators

In technical analysis, an oscillator is an indicator that MetaTrader 4 draws in a separate window under the chart, not on the candles. Unlike an overlay such as a moving average, it turns recent price action into a reading that swings between fixed levels, often 0 to 100, or around a zero line, so the strength of a move shows even when price looks flat.

The free MT4 oscillators here fall into four families. Momentum oscillators such as RSI, Stochastic, Stochastic RSI and Williams %R measure how fast price moves. Zero-line oscillators such as MACD with its histogram, OsMA, CCI and the Awesome Oscillator swing above and below zero. Volatility oscillators show the market contracting or expanding, and volume oscillators such as the Money Flow Index and Chaikin add traded volume.

Oscillators read best in range-bound, sideways markets, where overbought and oversold levels mark likely turns; in a strong trend they stay pinned at one extreme, so traders pair them with a trend indicator. Divergence makes many of them leading indicators, while MACD-style lines lag. All the oscillators here are .ex4 downloads built in MQL4, with a full installation guide for MetaTrader 4 on each page. Scalpers and swing traders use them on forex, gold, indices and crypto, often with a multi-timeframe view.