Alerts on volatility ETF's: SVXY (= short 1 month vix), VXX (= long 1 month vix) and ZIV (= short mid-term vix).
We profit when there is a strong tailwind. Mathematically approach. We don't pick up pennies in front of a steamroller. Never short the Vix when the futures are in backwardation. Duration of the trade: about 3 to 30 days.