I love trading these patterns. They are my favorites when I trade. Sometime it's difficult to spot because they need to complete the formation.
Diagonals aka wedges, usually people are confused with continuation triangle and get squeezed. Has 2 types: leading and ending. Leading has 2 entry points. If it breaks the first entry, wait for second one to enter an entry. Ending is where the trend is ended and nature going back to where it started.
Continuation triangle is a consolidate pattern where it moves in a range smaller and smaller until it bursts a final move to complete a trend. Triangle can take quite some times to finish the formation.
Diagonals can happen a lots but triangle is very rare.