want to note: in a 10% down move that happens rapidly, nothing works in terms of TA -- except holding short. I do not believe that indicators can predict a 10% down move. They can tell you that it is probable that it WILL COME, but shorter term charts cannot adequately time the beginning of it. Nor can typical patterns.
I realize the levels we have in terms of BB on the VIX or RVX, and that usually means some type of move higher -- except when it doesn't and the volatility moves higher. Only time will tell which type this is -- but we shall know soon enough.
have you tried pitchforks and parallel channels???