Coming back from social engagements, I opened the market and found that ETH had already fallen below the set price level. I was originally quite confident in this position, but I didn't have time to place a stop-loss order before it was already in trouble. Fortunately, ZEC had set up an automatic take-profit, which helped recover some losses. Regarding ETH, I actually had a short position to hedge risk, but I only realized later that the margin for the short was much smaller than the long position. Now it has become an awkward situation. This is why no matter how perfect the trading plan is, if execution is lacking, it's all for nothing. The volatility of ETH and ZEC has indeed been quite fierce these past few days, and it looks like I need to adjust my position structure carefully.