ETH major upgrade on 17 Oct:
After a lot of deliberations and updates, the time has finally arrived for the next big jump. There is a lot of buzz going on right now and for good reason. The last time Ethereum did a network shift i.e. from Frontier to Homestead, the price jumped more than 100% from $12 to $30.
Source: blockgeeks.com/guides/ethereum-metropolis/