Copper prices were dropping in 2015 but has been more or less sideways in 2016. When we look at the daily chart, we can see that the final drive down occurred in September 2015, after which price has been developing a triangle structure.Copper daily chart 9/20(click to enlarge)Accumulation stage:- The daily chart shows that price has indeed neutralized into a triangle. - We can see that the 200-, 100-, and 50-day simple moving averages (SMAs) have flattened.- Basically, we can say that copper has been in an accumulation stage for about a year. - I get the feeling that we will see a breakout this year as copper moves towards the apex of the triangle. Anticipating breakout:- To me, even more important than a breakout will be if price can confirm that breakout.- There is a "central pivot" to this consolidation pattern, and it is around the 2.13-2.15 area, which involves the cluster of SMAs, and a common pivot we can see in the middle of the triangle.- For example, if price breaks above the triangle and pulls back but holds above this 2.13-2.15 area, then I would be convinced of a bullish reversal outlook.Bullish within the triangle:- Last week, we saw a push from the triangle support area. I think we will see a test of the triangle resistance soon. If there is a dip, price should hold above 2.10 in this short-term bullish outlook within the context of a triangle.