Securities traders like to use candlesticks on their charts to predict whether prices will go up or down. A white candlestick indicates a bullish (positive) trend, while a black candlestick shows a negative trend.
When a black candlestick opens above the white candlestick’s closing price and below its midpoint, it indicates that bears took over later in the day and pushed the price sharply lower. This is known as the dark cloud cover.