BREAKING DOWN 'Hammer' A hammer occurs after a security has been declining, possibly suggesting the market is attempting to determine a bottom. The signal does not mean bullish investors have taken full control of a security, it simply indicates that the bulls are strengthening. Read more: Hammer Definition | Investopedia http://www.investopedia.com/terms/h/hammer.asp#ixzz3tmlZ3Hf2 Follow us: Investopedia on Facebook