Internal factors affecting ETH's price include AltCoin (token) ICO's pricing in ETH, then selling their ETH to lock in fiat funds to do the actual development work. Said differently, fund in ETH, and then sell the ETH to lock in funding. Their motivation is much different than investor's motives. With a lot of token ICOs yet to come this summer and fall, it's a wild guess as to how the ETH price level will play out.
Then there are the affects and impacts of BTC's moves. The leader of the crypto space tends to drag most or all large cap AltCoins with it when it moves. More questions than answers.
Based upon the Kraken data feed, research I have preformed at Etherscan, https://etherscan.io/, and now integrating the Elliott Wave, wave personality characteristics, It is much more readily apparent that the recent high above 400 has marked the conclusion of Wave 5, and the current correction scope and scale should cover the entire trading history. Among other changes, the Fibonacci retracement location of my current estimate of corrective wave A, will be revised up to a 61.8%, based upon the whole of the move. The data does include the hard fork splitting off ETC. https://blog.ethereum.org/2016/07/20/hard-fork-completed/
"Triangles (3-3-3-3-3; four types: ascending, descending, contracting, expanding)"
There is a section that discusses Horizontal Triangles just over halfway down the page.
The core group of EWavers split and began advancing their own derivatives based on personal observations and interests, while Prechter stayed closest to Elliott's analysis (orthodoxy), others including Neely and the late Zoran Gayer went off to include other factors. Neely principally included a time dimension in his NEoWave (https://www.scribd.com/doc/131381250/Glenn-Neely-Mastering-Elliott-Waves), while Gayer focused more on the fractal nature, chaos theory, and bifurcation points (http://yelnick.typepad.com/yelnick/zoran-bifurcation-theory.html).