Just focus on the big stocks like FB , AMZN , GOOGL and so on. If they cut through support levels and moving averages without attempting any rallies you know things are getting ugly. If we enter forced selling territory it could mean very quick long UVXY profits with the risk of violent upside reversal once the forced selling is over. Just check the declines over the last year and you see what I am talking about.
AMZN: Just watch if it finds support around its 50d or the low of the recent range as marked in the graph.
GOOGL (Not shown here): See if it clearly undercuts the intraday low of the recent gap-up. Next stop would be a gap filling.
MSFT (Not shown here): Watch if it undecuts it's 50d and closes below it. From there on this level could be resistance.
FB (Not shown here): This one has seen it's recent breakout fail hard on friday but it is still above it's 50d. If FB undercuts it's 50d it is actually very meaningful.
Just don't watch UVXY price action if you have a trade in it!