Normally, a big up day ends the rally short term, but we are in a "Meltup"(look at slv), so there is no way to know when this tops out.
Shorting is not an easy way to make money.
3400 should be a top, will think about shorting then.
BTW,insane levels of optimism in options, but the AAII numbers are normal for a major bear market, not a big rally. Will they be right, or are they eventually going to throw in the towel and start buying heavily?