如何按纽约时间绘制带标签的前一日/周高低点水平线

以下是实现纽约时间17:00每日高低点标记，仅显示前一日、前一周数据的代码与说明：

核心逻辑 #

1. 转换时区到纽约时间，定位每日17:00的K线节点
2. 提取该节点对应的当日高低点
3. 筛选出前一日、前一周的高低点数据
4. 绘制区分度高的线条与标签

//@version=5
indicator("NYC 17:00高低点标记", overlay=true)

// 转换为纽约时区（自动适配EST/EDT）
nyc_time = time(timezone="America/New_York")
is_nyc_5pm = hour(nyc_time) == 17 and minute(nyc_time) == 0

// 存储每日17:00对应的高低点
var float daily_high = na
var float daily_low = na
if is_nyc_5pm
    // 提取从上次17:00到当前的高低点
    daily_high := ta.highest(high, barssince(is_nyc_5pm)[1] + 1)
    daily_low := ta.lowest(low, barssince(is_nyc_5pm)[1] + 1)

// 获取前一日、前一周的高低点
prev_day_high = ta.valuewhen(timeframe.isdaily, daily_high, 1)
prev_day_low = ta.valuewhen(timeframe.isdaily, daily_low, 1)
prev_week_high = ta.valuewhen(timeframe.isweekly, daily_high, 1)
prev_week_low = ta.valuewhen(timeframe.isweekly, daily_low, 1)

// 绘制前一日高低点线条与标签
if barstate.islast
    // 高点线：绿色虚线
    line.new(bar_index - 1, prev_day_high, bar_index, prev_day_high, color=color.green, width=2, style=line.style_dashed)
    label.new(bar_index, prev_day_high, "前一日高点", color=color.green, textcolor=color.white, style=label.style_label_left)
    // 低点线：红色虚线
    line.new(bar_index - 1, prev_day_low, bar_index, prev_day_low, color=color.red, width=2, style=line.style_dashed)
    label.new(bar_index, prev_day_low, "前一日低点", color=color.red, textcolor=color.white, style=label.style_label_left)

// 绘制前一周高低点线条与标签
if barstate.islast
    // 高点线：蓝色实线
    line.new(bar_index - 5, prev_week_high, bar_index, prev_week_high, color=color.blue, width=2, style=line.style_solid)
    label.new(bar_index, prev_week_high, "前一周高点", color=color.blue, textcolor=color.white, style=label.style_label_left)
    // 低点线：橙色实线
    line.new(bar_index - 5, prev_week_low, bar_index, prev_week_low, color=color.orange, width=2, style=line.style_solid)
    label.new(bar_index, prev_week_low, "前一周低点", color=color.orange, textcolor=color.white, style=label.style_label_left)

关键细节说明 #

• 时区适配：America/New_York会自动切换夏令时/冬令时，无需手动调整
• 高低点准确性：通过barssince定位上一次17:00的K线，确保提取的是完整交易日的高低点
• 性能优化：仅在最后一根K线（barstate.islast）绘制线条与标签，避免重复渲染
• 视觉区分：用不同颜色、线条样式区分前一日（虚线）与前一周（实线）数据，标签紧贴线条便于识别

内容的提问来源于stack exchange，提问作者Crypto Gainz