On the previous chart, the BTC was in the overbought zone with a high probability that they RSI will break and making a downtrend pushing ZEC to a pump. Today, the King, seems to be solid and bullish. Attempts to break the resistance of the highest psychological weight USD 740 and falls, but it recovers immediately. Without giving time to most of the altcoins mark a healthy and constant trend. On white colour I marked the behavior of ZEC / BTC and how it is affected by the BTC / USD (like a mirror) If there is a significant drop, ZEC and XMR will be the first to wake up. With arrows I marked the scenarios always taking into account the BTC.