Cause of the uptrend before the triangle formation, it is very possible to have a following uptrend after the sym . triangle (min.:+100.00-120.00).
Go into the trade only when the will be broken (80% possibility).
In case of breaking the first, go out of the trade, or go short (20% possibility).
Thats just a speculation so please be careful!
Nice to read about your idea too.