A spinning top or (koma) is a candlestick which the body of the candlestick is smaller than the lower and upper wicks. This candle represents a neutral position in which neither the bulls or bears are able to gain control during the trading session. The color of the real body is irrelevant as the body of the candle is so small. If a spinning top arises after a strong uptrend or downtrend, it is an early sign that the trend could be reversing. Traders should wait for more confirmation that the trend is changing prior to taking a short or long position.
Spinning Tops have longer shadows than bodies and whether they are green or red is commonly not significant as they imply market indecision and the trend is neither bullish nor bearish. The open and close prices for the period are very close, so in real terms the market has not really shifted, although there may have been a high or low spike (or both) during that period.