A pennant looks to be forming in ETH and importantly it's forming above the downtrend since the May peak. Pennants typically break out in the same direction they entered it and can move fast.
A daily close above the upper boundary is needed for confirmation. Next major resistance seen at ~350-400 zone as can be seen more clearly on the weekly. Selling pressure to be expected at that level.
A break below the lower boundary of the pennant and the long trade has failed.