Below the 800.0 level, there is a which contains Fibonacci levels of the global uptrend and 200-days . If the market is about to get into state, then the turnaround should happen in this zone. Otherwise, I expect a deeper correction.
Nonetheless, I would wait until the price crosses the Angle Resistance to prove that lowering tendency is going to change.
One of the fundamental reasons for the lowering ETH is Bitcoin . As the BItcoin is an accelerator of all crypto markets, the weak Bitcoin (lower then 10000.0 psychological level with uncertain future) drags the coins down. Hence, until BTCUSD pair shows a confident growth - a turnaround of the ETHUSD is unlikely.