Alcoa is due for a 15% increase

According to my novice chart reading, I'm predicting an approximate 15% increase for Alcoa over the next 3 months. There is a symmetrical triangle forming with a corresponding increase in buying volume. I think the price will trade within this triangle, then get out when it hits the tip in a couple of months.

I plan to begin slow with my position to test my theory, then place trailing stops along the way in case things don't go my way.