Is this a symmetrical triangle or something else? When you reading patterns how much deviation do you allow from the basic pattern? And what else do you look at
Although proper trading is about following your rules it is way more art than science. If it looks right it is right but only within the rules for entry/exit/trade and account management.
I wouldn't worry too much about the symmetry of the triangle. The Important thing here is the series of ascending lows and some higher highs. On balance it's more likely to go up than down. Not a certainty, but it's what to watch for.
Triangles are correction patterns... market usually breaks out in the same direction it came into the pattern.