求助：如何检测最新K线对支撑/阻力线的测试穿越

现有代码仅能检测前一根K线对支撑线和阻力线的穿越情况，需修改为检测最新K线的穿越行为。

现有代码 #

for i = 0 to support.size() - 1
      
    if (high[1] > support.get(i).get_y1() and math.max(open[1],close[1])< support.get(i).get_y1()) or (low[1] < support.get(i).get_y1() and math.min(open[1],close[1])> support.get(i).get_y1()) 
          lastCrossedBar := bar_index
          deleteLine := true
          if deleteLine
               line.delete(support.get(i)) 
for i = 0 to resistance.size() - 1
    if (high[1] > resistance.get(i).get_y1() and math.max(open[1],close[1])< resistance.get(i).get_y1()) or (low[1] < resistance.get(i).get_y1() and math.min(open[1],close[1])> resistance.get(i).get_y1())
          lastCrossedBar := bar_index
          deleteLine := true
          if deleteLine        
               line.delete(resistance.get(i))

修改方案 #

在Pine Script中，[1]代表前一根K线的行情数据，[0]才是最新K线（当前Bar）的行情数据。只需将代码中所有的high[1]、open[1]、close[1]、low[1]替换为high[0]、open[0]、close[0]、low[0]，即可实现检测最新K线的穿越逻辑。

修改后的完整代码 #

// 检测最新K线对支撑线的穿越
for i = 0 to support.size() - 1
    supportLevel = support.get(i).get_y1()
    // 判断最新K线是否穿越支撑线
    if (high[0] > supportLevel and math.max(open[0], close[0]) < supportLevel) or (low[0] < supportLevel and math.min(open[0], close[0]) > supportLevel)
        lastCrossedBar := bar_index
        deleteLine := true
        if deleteLine
            line.delete(support.get(i))

// 检测最新K线对阻力线的穿越
for i = 0 to resistance.size() - 1
    resistanceLevel = resistance.get(i).get_y1()
    // 判断最新K线是否穿越阻力线
    if (high[0] > resistanceLevel and math.max(open[0], close[0]) < resistanceLevel) or (low[0] < resistanceLevel and math.min(open[0], close[0]) > resistanceLevel)
        lastCrossedBar := bar_index
        deleteLine := true
        if deleteLine
            line.delete(resistance.get(i))

补充说明 #

• 新增supportLevel和resistanceLevel变量，提升代码可读性
• 保留原逻辑中的穿越判断条件：K线实体位于线的一侧，影线穿透至另一侧
• 图片说明：展示了K线穿越支撑/阻力线的典型场景，辅助理解穿越检测的触发逻辑

内容的提问来源于stack exchange，提问作者Javier Franco Lineros