如何删除前一个（或第n个）标签？

我正在尝试实施一个这个问题的答案 https://stackoverflow.com/a/73437787/2229856，但不知何故没有显示标签，也没有显示任何错误消息。在此代码之外，所有标签都会显示，因此label.new()实例本身运行良好。

我做错了什么？

var label HighRSILabel = na

if(rsi > 70)
    if(na(HighRSILabel)) //Does not exist, create one
        HighRSILabel := label.new(bar_index, high, color=color.orange, text="RSI", textcolor=color.black, tooltip="RSI > 70", style=label.style_label_down)
    else
        label.set_x(HighRSILabel, bar_index)

Are you sure your symbol(e.g. BTCUSD) ever hit 70 rsi? Because if it never hit 70 rsi no label will be created. I tried your code with the symbol DOTEUR (1day) and it works as it should.

You can use tradingviews "<<Replay" function to see how the label moves through time for easier debugging.

这是代码：

//@version=5
indicator("rsi last")

var label HighRSILabel = na

rsi = ta.rsi(close, 10)

plot(rsi)
hline(70)
hline(30)

if(rsi > 70)
    if(na(HighRSILabel)) //Does not exist, create one
        HighRSILabel := label.new(bar_index, rsi, color=color.orange, text="RSI", textcolor=color.black, tooltip="RSI > 70", style=label.style_label_down)
    else
        label.set_x(HighRSILabel, bar_index)