Crows, and especially ravens, often feature in European legends or mythology as portents or harbingers of doom or death, because of their dark plumage, unnerving calls, and tendency to eat carrion.
According to Druid tradition they're also believed to bring upon new changes (death to one phase of your life and the birth to another) A version of the three crows is probably based on the three ravens folk tale where three crows plot to devour the corpse of a dead knight.
In the story, a man called Conrad was robbed of his money and beaten hard so that he became blind.
[5] The Three Crows (三羽烏) may refer to the group of three Go players who are part of the triumvirate of certain eras in Go history.
[6] There are those who recommend, however, that investors should not be alarmed since an identical three crow pattern in a primary uptrend will likely break out downward but reverse in a few days.