Price trend Upward leading to the pattern.
Shape A big M shape with twin peaks and tall sides.
Reversal pattern Look for a reversal pattern at the top of the big M.
Tall sides The should have twin peaks with highs less than 4% apart.
Drop between tops The drop between the peaks of the is 10% to 20% or more.
Breakout confirmation The pattern confirms as a valid one when price closes below the lowest valley between the double tops.