It's possible. On a SP daily chart but it still looks like it will close below the 200DMA unless we get big rally in the last hour which could be another positive sign if it did happen. IMO, the quicker it retakes the 200DMA the better... if it is a bottom be it short term or longer term.The bounce back from the lows today was certainly noteworthy and may qualify as capitulation. Now do you see the hammer candlestick pattern?
There can be big rallies in big downturns too so hard to know for sure when you're in it but see it when you look back