It's pretty simple.(IF I can learn it, anybody can !) Most of the moves in the big momentum stops tend to have symmetrical patterns. Measure from the beginning of the move. After the measuring gap, the stock should move the amount of the previous move. The trick is where to start measuring after the gap. I take the low of the price within the gap to start measuring. It also works for bull and bear flags. Good luck!
Please see my reply today. I hope it helps. Basically I took the the amount of the first down move..17.77 points, and then subtracted that amount from the high in the gap..around 194.58. That get's you to around 176.81. That would be the first objective. By the way, like I said earlier, don't worry being new to this, if I can learn it, anyone can!