This is not an easy trading environment, but positions can be taken long at the bottom of the range between $165 and $167.
At the top of the range shorts shall obviously be taken, between $186.50 and $183.
Be aware that there are some intermediate S/R levels at $169 and $177.50.
You can make your long/short decisions based of the ADX/DI indicator. If the DI+ is above the DI- (green above red) prices might go up and if DI- is above DI+ (red above green), prices might go down.
If the (colour changing line) is below 20 ETH/USD will most probably keep ranging and above 20 a trend might be developing.
This is just my opinion and never trade just based on this one opinion and do your own research before taking on a trade.
Keep in mind that the markets have a mind of their own, and that you will lose money if you don't do your own market analysis.