I do not always sell without any green candle. I watch out for he slightest opportunity for profit, then i sell.
You can consider holding ethereum for now. At least you will get two benefits doing that: you will earn the hardfork that is about to be distributed, you will also be able to make some profits after holding for some time.
At a point, if you are a good trader, you can trade it conveniently and make your profit.