A ETHEUR longterm weekly macd-evaluation seems to give a fairly indicative picture. After the MACD of this timeframe shifts towards lower levels the price does not fail to continue a significant set-back. Aproximate numbers, measured from the highest price before the arrow, to the lowest on the slope (errors may occure): Jul -17; 234€ (68%), Aug -17; 165 (50%), Jan -18; 1200 (95%) un-relevantly large? May -18; 620 (90%), Jul -19; 210 (66%), March -20; -180€ (70%), Aug -20; so far 140€ (35%).
Now, the current change is quite flat, so it may or may not tip over, but if it does, a significant downside becomes more likely.
Also take a look at the yellow pre 2018 recistance.