I've been here many times, wait.
Why not a dead cat bounce? How can you tell it will fall further and not oversold? Interested in your advise.
Not yet. Wait for the 2nd plunge. Bottom fishers today will bail if this goes down another 10% tomorrow.
Your scenario of another 10% on top of today is unlikely, unless it dips for a brief bit at the open. And the mutual funds don't bail in one day.