Lets hope correction doesnt turn into that other awful C-word. Sessions with one major stock index closing higher while another finishes lower have become more frequent, and that doesn’t reflect a healthy market. Though recent divergences aren’t as extreme as those seen in March 2000, they are nevertheless much higher than the norm. Right now the divergence is at 1% point difference. In 2000 it was at 2%.
Market crash signals:
1. If a strong early rally reverses direction by the end of the day.
2. The buy-on-the-dip strategy is failing.
3. Prices falling is the last indicator of a crash the first happens weeks ahead. The catalyst could be something like China delisting companies. The Fed stopping its bond buying.
Inflation going too high. Or all of the above.
4. Cryptocurrency starts moving in tandem with the market dips.
How to profit from the market crash:
1.Sell long positions and move into cash until the storm has passed.
2. Buy puts on the S&P 500.
 3.Buy inverse ETFs.
4. Short individual stocks. 
You also must know how much pain you can accept (i.e., risk tolerance). If you can handle a 30% or 40% downturn, then stay the course. If not, move to the sidelines.
Market crashes arent necessarily bad but should be seen as buying opportunities. Except for China stocks since US is now imposing regulations against them and China could continue with more. They have lost 1 trillion dollars in value since February. There is no upside or reason to be buying Chinese stocks right now.

A cold week. But anyway, have a nice weekend my friends.
Next week I will upload more details on each sector, please follow me to catch new updates