Nifty from last 3 days is trading in narrow range of 80 points from 18880 to 18000. Always when range becomes narrow, the next day or so range increase. If 18800 is broken downside is at least 200 points ( 18800-200=18600), and up 18880 + 200= 19080.
As per candle stick pattern, it looks like hanging man, which is bearish reversal pattern.