For Question #15 Read:Japanese Candlestick Anatomy The small real body (whether hollow or filled) shows little movement from open to close, and the shadows indicate that both buyers and sellers were fighting but nobody could gain the upper hand.
For Question #19 Read:Single Candlestick Patterns The hammer is a bullish reversal pattern that forms during a downtrend. It is named because the market is hammering out a bottom.
For Question #20 Read:Single Candlestick Patterns The hanging man is a bearish reversal pattern that can also mark a top or strong resistance level. When price is rising, the formation of a hanging man indicates that sellers are beginning to outnumber buyers.