trend-toolsv0.1.0

当用户要在图上识别并利用支撑与阻挡（含角色互换）、绘制/判定趋势线与管道线、用百分比回撤找加仓区、 理解速度线/扇形原理、或识别价格跳空与反转日时激活。这是全书最高频、最落地的工具集。 不适用于：判断宏观趋势层级（转 dow-theory-framework）、识别头肩等特定形态（转 reversal-patterns）。 关键 trigger 词：支撑位阻力位、趋势线怎么画、跌破趋势线、50%回撤、跳空、反转日、扇形。 Activate when the user wants to identify and use support & resistance (incl. role reversal), draw/judge trendlines and channels, use percentage retracement for add-zones, understand speed lines/fan principle, or identify price gaps and reversal days. This is the highest-frequency, most practical toolset in the book. Not applicable: judging macro trend hierarchy (-> dow-theory-framework), identifying specific patterns like head-and-shoulders (-> reversal-patterns). Key trigger words: support/resistance, how to draw trendline, break below trendline, 50% retracement, gap, reversal day, fan.