EDUCATIONAL TIP --what is trend reversal .
once trend has been set either bullish or bearish trend reversal happen into opposite trend direction for that some technical sign we can see for this reversal .. e.g. if nifty fall sharply 500 points from high then at bootm its gives some sign for reversal to bullish again like support, double bottom formation, moving avg cross, resistance breakout candle through which we can understand trend reversal. same case upside double top, death cross, rejection at resistance we can predict nifty will fall from top level.