The Black Marubozu belongs to the group of basic candles. It's an 'opposite' candlestick to the White Marubozu and, for this reason, has the exactly the opposite meaning. The lack of shadows means an opening at the maximum level and a steady decline in prices during the session, so its significance is very pessimistic as it indicates the strength and determination of the bears -- the bears controlled the market from open to close. Its importance depends on a broader context of a chart, as it may be part of another pattern, both bullish and bearish.