While Ethereum price just broke the $300.00 mark successfully on Sep 27 (ETH against the USD is trading now at $305.62 with 5.64% gain in the last 24-hours) as the market restructures, however for the next catalyst for another upward climb could the Byzantium hard fork be.
Originally scheduled to take place on October 9, the fork was postponed to October 17 because, Ethereum founder Vitalik Buterin said that it was the smart thing to do.
Full article here: http://ethereumworldnews.com/byzantium-fork-will-hoist-ethereum-price-400-future-prediction-bullish-trend/