For those waiting to start buying (broad etf in particular), what are you waiting for S&P to hit? 4000 for me.

For those waiting to start buying (broad etf in particular), what are you waiting for S&P to hit? 4000 for me. I will buy around 15% of my funds avail and wait for further drop….for those who are using the S&P or Nasdaq as an alert, what level are you eyeing?

thanks