MACD was created by Gerald Appel. MACD belongs to the Momentum Oscillators, that indicate the dynamics and strength of the current trend and oscillates around the zero line in both directions. MACD is an abbreviation for Moving Average Covergence Divergence. As the title says, it is all about approaching and retreating of moving averages (convergences and divergences).

Keltner Channel was named after its author Chester W. Keltner. It's a typical Envelope indicator (alike the MA Envelopes), but it is also based on market volatility (similar to Bollinger Bands). It consists of a midpoint and 2 envelopes - upper one and lower one. The middle value is usually EMA20.

Envelopes are an easy indicator to use. It consists of two moving averages, or we can also say of two variations of one moving average.

Detrended Price Oscillator was created with the aim to help traders identify basic short-term market cycles.

Donchian Channel was created by Richard Donchian and published in 1970.

Demarker indicator was created by Thomas Demarker. Demarker indicator identifies the moments when Bulls and Bears begin to loose their power so the trend reversion can be expected. The indicator is based on comparing actual and previous prices, so it can find out whether the demand is rising or falling.