Known as a FRYPAN BOTTOM which is a reversal sign. which reflects a makret that is bottoming and whose price action forms a concave design and then opens a gap to the upside. This basically proves that the bears are losing a foothold due to the a Rising Gap of the White Candle Stick.
Adding on to the   confirmation of  reversal, there  is an increase in trading volume on the day the rising gap is formed..