The Parabolic SAR refers to a price-and-time-based trading system, Psar indicator is below prices when prices are rising and above prices when prices are falling. the indicator stops and reverses when the price trend reverses and breaks above or below the indicator.
Super trend is also trend based simple indicator works with ATR
For more details check the below link http://zerodha.com/varsity/chapter/supplementary-notes-1/