Inside the triangle is sloppy risk control. Wait for a break and daily Close below the Ascending support drawn across the triangle (B)(D) lows. Then short immediately. The opportunity is short into 19.56 target with stops above the (E) wave highs, wherever they come in for at least 2.0:1 reward. Then no fooling around at the target. Take profit immediately. Probable transition at that level.
This Short setup invalidates at any print above 38.59.
Basing is a Wyckhoff concept that I don't use because it's too loose.
The analytic concept here is the current EW triangle and the pattern follow through implications that it suggests.