Ether (ETH) has been struggling with the $1,680 resistance since Jan. 20. Still, the ascending triangle pattern and improvements in investor sentiment in ETH derivatives provides hope that Ether price could reach $1,800 or higher by the end of February. This, of course, depends on how the Ether price behaves as it reaches the pattern deadline by mid-February. From one side, traders are relieved that Ether is trading up 33% year-to-date, but the repeated failures to break the $1,680 resistance coupled with negative newsflow might give bears the power to cancel the bullish triangle pattern. According to a Jan. 30 …