Recently, during the market fluctuations, I adopted a strategy of high selling and low buying within a range for short-term trading. First, I focused on the support and resistance levels of BTC and ETH, using technical indicators like MACD and RSI to determine overbought and oversold conditions. When the price approached the support level, I tentatively bought with a small position, and reduced my holdings to take profit before breaking through key resistance levels. In addition, I also combined on-chain data and market sentiment indicators to avoid chasing highs and selling lows. In terms of risk control, I set stop-loss orders for each trade, keeping the position within 30% of the total capital. Throughout the process, sticking to the plan and avoiding emotional trading has been the key to my steady profitability.