日内时间框架跨多交易日标记指定bars的技术需求与问题

需求 #

• 在日内（intraday）时间框架下，从用户指定的起始时间开始，计算固定数量的K线（bars）并标记这些K线，支持跨多个交易时段。

现存问题 #

• 当前代码在当日交易时段结束后停止计数与标记，无法跨后续交易日的交易时段继续。
• 代码仅适配5分钟时间框架，无法兼容任意日内时间框架。

原5分钟框架代码（无法跨时段运行） #

//@version=5
indicator("Gann TimeCycle", overlay=true)

IntraColor = input.color(color.new(color.aqua, 55), "IntraColor")

Intra = input(defval=true, title="Intra", group = "Gann Cycles", inline = "Intra")
IntraStart = input.time(timestamp("12 Jan 2023 00:01 +0000"), "Intra StartDate")

z = 1 * (Intra ? 1 : 0)

//plot intra cycle
line.new(IntraStart, close, IntraStart, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart, close, text="i0", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*9*300000, close, IntraStart + z*9*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*9*300000, close, text="i9", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*17*300000, close, IntraStart + z*17*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*17*300000, close, text="i17", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*26*300000, close, IntraStart + z*26*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*26*300000, close, text="i26", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*34*300000, close, IntraStart + z*34*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*34*300000, close, text="i34", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*40*300000, close, IntraStart + z*40*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*40*300000, close, text="i40", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*55*300000, close, IntraStart + z*55*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*55*300000, close, text="i55", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*68*300000, close, IntraStart + z*68*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*68*300000, close, text="i68", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*77*300000, close, IntraStart + z*77*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*77*300000, close, text="i77", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*80*300000, close, IntraStart + z*80*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*80*300000, close, text="i80", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*90*300000, close, IntraStart + z*90*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*90*300000, close, text="i90", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*103*300000, close, IntraStart + z*103*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*103*300000, close, text="i103", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*112*300000, close, IntraStart + z*112*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*112*300000, close, text="i112", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*121*300000, close, IntraStart + z*121*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*121*300000, close, text="i121", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*135*300000, close, IntraStart + z*135*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*135*300000, close, text="i135", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

line.new(IntraStart + z*144*300000, close, IntraStart + z*144*300000, close, xloc = xloc.bar_time, extend=extend.both, color=IntraColor , width = 1)
label.new(IntraStart + z*144*300000, close, text="i144", xloc = xloc.bar_time, yloc=yloc.belowbar, style = label.style_none, textcolor = IntraColor)

改进后的代码（支持任意日内框架+跨时段标记） #

//@version=5
indicator("Gann TimeCycle - 跨时段版", overlay=true)

// 用户输入
IntraColor = input.color(color.new(color.aqua, 55), "标记颜色")
Intra = input(defval=true, title="启用日内周期标记", group = "Gann Cycles", inline = "Intra")
IntraStart = input.time(timestamp("12 Jan 2023 00:01 +0000"), "起始时间")
// 定义需要标记的Bar数量列表
cycleBars = input.intarray([0,9,17,26,34,40,55,68,77,80,90,103,112,121,135,144], "需要标记的Bar序号", group = "Gann Cycles")

// 计算从起始时间到当前Bar的累计Bar数量
var int startBarIndex = na
if not na(IntraStart) and Intra
    // 找到起始时间对应的Bar索引
    if time == IntraStart
        startBarIndex := bar_index
    // 如果起始时间在历史Bar中，初始化startBarIndex
    else if na(startBarIndex) and IntraStart < time[0] and IntraStart > time[1]
        startBarIndex := bar_index - 1

// 遍历需要标记的Bar序号，绘制线条和标签
if Intra and not na(startBarIndex)
    for barNum in cycleBars
        // 计算目标Bar的索引
        targetBarIndex = startBarIndex + barNum
        // 确保目标Bar存在
        if targetBarIndex >= 0 and targetBarIndex <= bar_index
            targetTime = time[bar_index - targetBarIndex]
            line.new(targetTime, low, targetTime, high, xloc=xloc.bar_time, extend=extend.both, color=IntraColor, width=1)
            label.new(targetTime, low, text="i" + str.tostring(barNum), xloc=xloc.bar_time, yloc=yloc.belowbar, style=label.style_none, textcolor=IntraColor)

关键改进说明 #

• 适配任意日内时间框架：不再硬编码Bar时长，通过K线的索引计数，无需关注不同时间框架的时间差，自动兼容所有日内周期。
• 跨交易时段计数：使用bar_index统计实际存在的K线数量，直接跳过非交易时段的空白时间，自然支持跨交易日的交易时段继续计数。
• 代码优化：将需要标记的Bar序号整理为数组，通过循环批量绘制标记，大幅减少重复代码，后续修改或添加标记点更便捷。
• 精准起始定位：通过判断起始时间与历史K线时间的关系，精准锁定起始K线的索引，确保计数从正确的位置开始。

内容的提问来源于stack exchange，提问作者Bhaavin Ashar