Each of the three candlesticks in the Three Black Crows pattern should be relatively long bearish candlesticks with each candlestick closing at or near the low price for the period. Each successive candlestick should mark a steady decline in price and should not have long lower shadows or wicks. Preferably, each of the three candlesticks should open within the real body of the preceding candlestick in the pattern but this is not essential. When this pattern appears in an uptrend, it indicates the potential weakening of the trend and a possible trend reversal. However, if the three candlesticks are over extended and make significant price declines, you may need to be wary of oversold conditions.