我想在股票开始之前绘制所有前几天的高点和低点

Question

我想画出股票开始前所有日子的所有高点和低点。我尝试了我们如何用python编写...... 但它不起作用。帮助我如何在不手动编写的情况下动态绘制所有这些线条

//@version=4
study("My Script", overlay=true)
y = 0
for i = 0 to 10
       y := y + 1
    hh := floor(security(tickerid, "D", high[y]))+0
    ll := ceil(security(tickerid, "D", low[y]))+0
    plot(hh, style=plot.style_line, title="Resistance Line", color=color.blue, show_last=1, linewidth=2, trackprice=true)
    plot(ll, style=plot.style_line, title="Resistance Line", color=color.blue, show_last=1, linewidth=2, trackprice=true)```

I want horizontal lines without ending right side

Answer 1

有一个称为 Donchian Channels 的内置指标。我给你我的自定义版本，它允许你分别设置高点和低点的时间段（柱数）。

//@version=4
study(title = "Donchian Channels", shorttitle = "DC", overlay = true)

Ulen = input(90, title = "Upper Channel", type = input.integer, minval = 3)
Llen = input(7, title = "Lower Channel", type = input.integer, minval = 3)

upper = highest(high, Ulen)
lower = lowest(low, Llen)
median = avg(upper, lower)

plot(upper, title = "Upper Channel", color = color.new(#4caf50, 0), linewidth = 2)
plot(lower, title = "Lower Channel", color = color.new(#f44336, 0), linewidth = 2)
plot(median, title = "Median", color = color.new(#ff9800, 0), linewidth = 2)