从前一日高点低点开始到当前柱线的水平线

Question

我正在尝试绘制前一天的高点/低点，这是代码：

//@version=5

indicator('PDHL', overlay=true)

show_pdhl = input(true, 'Show Previous Day High/Low')

[_from, p_high, p_low, p_mid, c_open] = request.security(syminfo.tickerid, 'D', [time, high[1], low[1], hl2[1], open], lookahead = barmerge.lookahead_on)

if show_pdhl    
    p_high_line = line.new(_from, p_high, time, p_high, xloc.bar_time, color=color.red)
    line.delete(p_high_line[1])
    p_high_label = label.new(bar_index, p_high, style=label.style_label_left, size=size.small, color=#ffffff, text='PDH', textcolor=color.red)
    label.delete(p_high_label[1])

    p_low_line = line.new(_from, p_low, time, p_low, xloc.bar_time, color=color.green)
    line.delete(p_low_line[1])
    p_low_label = label.new(bar_index, p_low, style=label.style_label_left, size=size.small, color=#ffffff, text='PDL', textcolor=color.green)
    label.delete(p_low_label[1])

这绘制了从新一天开盘开始的线条。我想要做的是从创建高/低点的确切点开始绘制线条（为了更好的参考）并延伸到当前柱。

Answer 1

您无法使用

security()

功能来做到这一点。您需要自己跟踪价格及其条形指数。

以下是

high

价格的示例：

var prev_day_high = high
var prev_day_high_idx = bar_index
var prev_day_high_line = line.new(na, na, na, na)
var day_high = high
var day_high_idx = bar_index

is_new_day = ta.change(time("D"))

if (is_new_day)
    prev_day_high := day_high
    prev_day_high_idx := day_high_idx
    // Create your lines here

    day_high := high
    day_high_idx := bar_index
else
    // Update your lines' x2 here so they would extend to the current bar
    if (high > day_high)
        day_high := high
        day_high_idx := bar_index