Good idea....some short or more correctly put "inversely correlated ETF's" are as follows:
More conservative (1 point move)
SH - short S&P Index; DOG - short Dow Jones; PSQ - short NASDAQ 100; RWM - short russell 2000 a/k/a small caps
Ultra short ETF's (2 point moves - more aggressive)
SDS - short S&P; DXD - short Dow Jones; QID - short NASDAQ 100; TWM - short Russell 2000