日内斐波那契指标var line设置：如何让线在最新K线处截止并随新K更新

我制作了一个日内斐波那契（intraday Fibonacci）指标，但由于是首次使用var line（此前一直使用plot），遇到了设置难题。目前设置extend.right时，指标线会向右无限延伸；关闭extend.right后，线又无法覆盖至最新K线。我希望实现指标线自动生成并在最后一根蜡烛处截止，且在新蜡烛形成时自动更新延伸的效果，请问该如何调整以下代码？

//@version=5

indicator(title='Auto Intraday Fibonnaci', overlay=true)

line_width = input.int(title="Line Width", defval=2, minval=1, maxval=100)

Fhigh = request.security(syminfo.tickerid, 'D', high)
Flow = request.security(syminfo.tickerid, 'D', low)

F0 = Flow
F236 = (Fhigh - Flow) * 0.236 + Flow
F382 = (Fhigh - Flow) * 0.382 + Flow
F500 = (Fhigh - Flow) * 0.500 + Flow
F618 = (Fhigh - Flow) * 0.618 + Flow
F786 = (Fhigh - Flow) * 0.786 + Flow
F1000 = (Fhigh - Flow) * 1.000 + Flow

f_newLine(_color) => line.new(na, na, na, na, xloc.bar_time, extend.right, color=_color, width=line_width)

f_moveLine(_line, _x, _y) =>
    line.set_xy1(_line, _x,   _y)
    line.set_xy2(_line, _x+1, _y)

var line    line_0 = f_newLine(color.gray)
var line    line_236 = f_newLine(color.gray)
var line    line_382 = f_newLine(color.gray)
var line    line_500 = f_newLine(color.orange)
var line    line_618 = f_newLine(color.orange)
var line    line_786 = f_newLine(color.gray)
var line    line_1000 = f_newLine(color.gray)

[t0,t236,t382,t500,t618,t786,t1000,dt] = request.security(syminfo.tickerid,"D", [F0,F236,F382,F500,F618,F786,F1000,time], lookahead=barmerge.lookahead_on)

if barstate.islast
    f_moveLine(line_0, dt, t0)
    f_moveLine(line_236, dt, t236)
    f_moveLine(line_382, dt, t382)
    f_moveLine(line_500, dt, t500)
    f_moveLine(line_618, dt, t618)
    f_moveLine(line_786, dt, t786)
    f_moveLine(line_1000, dt, t1000)

plotshape(F0 ? F0 : na, style=shape.circle, location=location.absolute, color=color.rgb(120, 123, 134, 100), textcolor=color.new(color.gray, 0), show_last=1, text='0.000', offset=5)
plotshape(F236 ? F236 : na, style=shape.circle, location=location.absolute, color=color.rgb(120, 123, 134, 100), textcolor=color.new(color.gray, 0), show_last=1, text='0.236', offset=5)
plotshape(F382 ? F382 : na, style=shape.circle, location=location.absolute, color=color.rgb(120, 123, 134, 100), textcolor=color.new(color.gray, 0), show_last=1, text='0.382', offset=5)
plotshape(F500 ? F500 : na, style=shape.circle, location=location.absolute, color=color.rgb(255, 235, 59, 100), textcolor=color.new(color.orange, 0), show_last=1, text='0.500', offset=5)
plotshape(F618 ? F618 : na, style=shape.circle, location=location.absolute, color=color.rgb(255, 235, 59, 100), textcolor=color.new(color.orange, 0), show_last=1, text='0.618', offset=5)
plotshape(F786 ? F786 : na, style=shape.circle, location=location.absolute, color=color.rgb(120, 123, 134, 100), textcolor=color.new(color.gray, 0), show_last=1, text='0.786', offset=5)
plotshape(F1000 ? F1000 : na, style=shape.circle, location=location.absolute, color=color.rgb(120, 123, 134, 100), textcolor=color.new(color.gray, 0), show_last=1, text='1.000', offset=5)

核心思路是关闭extend.right，并将线的终点动态绑定到当前最新K线的时间，这样线会刚好覆盖到最后一根蜡烛，且新K线形成时自动更新终点位置。具体修改如下：

1. 修改f_newLine函数，将extend.right改为extend.none，关闭无限延伸
2. 修改f_moveLine函数，把线的终点从固定的_x+1改为当前K线的time
3. 移除barstate.islast限制，让每根K线都更新线的终点，确保实时跟随最新行情

以下是完整修改后的代码：

//@version=5

indicator(title='Auto Intraday Fibonnaci', overlay=true)

line_width = input.int(title="Line Width", defval=2, minval=1, maxval=100)

Fhigh = request.security(syminfo.tickerid, 'D', high)
Flow = request.security(syminfo.tickerid, 'D', low)

F0 = Flow
F236 = (Fhigh - Flow) * 0.236 + Flow
F382 = (Fhigh - Flow) * 0.382 + Flow
F500 = (Fhigh - Flow) * 0.500 + Flow
F618 = (Fhigh - Flow) * 0.618 + Flow
F786 = (Fhigh - Flow) * 0.786 + Flow
F1000 = (Fhigh - Flow) * 1.000 + Flow

// 修改：关闭无限延伸，使用extend.none
f_newLine(_color) => line.new(na, na, na, na, xloc.bar_time, extend.none, color=_color, width=line_width)

// 修改：将线的终点设置为当前最新K线的时间time
f_moveLine(_line, _startX, _y) =>
    line.set_xy1(_line, _startX, _y)
    line.set_xy2(_line, time, _y)

var line    line_0 = f_newLine(color.gray)
var line    line_236 = f_newLine(color.gray)
var line    line_382 = f_newLine(color.gray)
var line    line_500 = f_newLine(color.orange)
var line    line_618 = f_newLine(color.orange)
var line    line_786 = f_newLine(color.gray)
var line    line_1000 = f_newLine(color.gray)

[t0,t236,t382,t500,t618,t786,t1000,dt] = request.security(syminfo.tickerid,"D", [F0,F236,F382,F500,F618,F786,F1000,time], lookahead=barmerge.lookahead_on)

// 实时更新线的终点，确保跟随最新K线
f_moveLine(line_0, dt, t0)
f_moveLine(line_236, dt, t236)
f_moveLine(line_382, dt, t382)
f_moveLine(line_500, dt, t500)
f_moveLine(line_618, dt, t618)
f_moveLine(line_786, dt, t786)
f_moveLine(line_1000, dt, t1000)

plotshape(F0 ? F0 : na, style=shape.circle, location=location.absolute, color=color.rgb(120, 123, 134, 100), textcolor=color.new(color.gray, 0), show_last=1, text='0.000', offset=5)
plotshape(F236 ? F236 : na, style=shape.circle, location=location.absolute, color=color.rgb(120, 123, 134, 100), textcolor=color.new(color.gray, 0), show_last=1, text='0.236', offset=5)
plotshape(F382 ? F382 : na, style=shape.circle, location=location.absolute, color=color.rgb(120, 123, 134, 100), textcolor=color.new(color.gray, 0), show_last=1, text='0.382', offset=5)
plotshape(F500 ? F500 : na, style=shape.circle, location=location.absolute, color=color.rgb(255, 235, 59, 100), textcolor=color.new(color.orange, 0), show_last=1, text='0.500', offset=5)
plotshape(F618 ? F618 : na, style=shape.circle, location=location.absolute, color=color.rgb(255, 235, 59, 100), textcolor=color.new(color.orange, 0), show_last=1, text='0.618', offset=5)
plotshape(F786 ? F786 : na, style=shape.circle, location=location.absolute, color=color.rgb(120, 123, 134, 100), textcolor=color.new(color.gray, 0), show_last=1, text='0.786', offset=5)
plotshape(F1000 ? F1000 : na, style=shape.circle, location=location.absolute, color=color.rgb(120, 123, 134, 100), textcolor=color.new(color.gray, 0), show_last=1, text='1.000', offset=5)

关键修改说明 #

• 关闭无限延伸：extend.none让线仅显示在起点和终点之间，不会无限向右延伸。
• 动态终点绑定：将线的终点设置为当前K线的time，每根新K线形成时，终点会自动更新到最新位置，刚好覆盖到最后一根蜡烛。
• 实时更新：移除barstate.islast判断后，线会在每根K线都更新，确保始终跟随最新行情变化。

内容的提问来源于stack exchange，提问作者Philo