This weakness in $ZEC could be misleading if judged by 24h trading volume: $163.8M indicates activity over the past day, but doesn’t mean selling pressure has been steadily increasing just now. Two verifiable facts are more direct: it fell 4.13% in the past 1h, underperforming $BTC by 4.01%; and the most recently closed 1h trading volume was 6.8 times the average hourly volume over the previous 4h. The range was 1227–1304, and it closed at 1234.66. If a subsequent closed 1h candle moves back above 1304 and the volume ratio falls, this explanation of short-term weakness should be downgraded.