CHART PATTERN

Bearish reversal patterns
double top pattern - prices go to almost same level twice and fall back and if support at base of pattern is broken by reasonable volume, it downs further.
head and shoulder pattern - 2 shoulders and 1 head. here level of head should be higher than both shoulders. although level of both shoulders may not be equal and it is accepted. lows which are formed both sides of head are important levels and draw a ray connecting these two points and if price fall below this line with support of good volume, direction of stock price may change from uptrend to downtrend.