A spinning bottom pattern at the bottom of a downtrend is a candlestick with a small body and long upper and lower shadows, showing indecision between buyers and sellers. Its appearance after sustained selling pressure indicates that bears are losing strength and bulls are starting to counter, suggesting a possible reversal. While it alone does not guarantee a trend change, if followed by a strong bullish candle, it often confirms the end of the downtrend and the beginning of a potential upward move.