我试图对第一个值 > 的情况发出警报或<其他

Question

我对编码相对较新，正在尝试弄清楚如何告诉 Pine Script 获取 macD 行 > 的第一个实例。且<信号线发出警报。目前，它为每支蜡烛显示一个标签。

尝试在第一次迭代后使“长”为假，直到“短”为真。每次交叉仅发出一次警报。

感谢那些提供帮助的人。我会给解决这个问题的人 15 xrp。

long = macd > signal
short = macd < signal
alertcondition(long, "Macd Long open", "message")
alertcondition(short, "Macd short open", "message")
if(long)
    l = label.new(bar_index, high)
    label.set_text(l, "buy@\n" + str.tostring(close))
    label.set_color(l, color.green)
    label.set_yloc(l, yloc.belowbar)
    label.set_style(l, label.style_label_up)

if(short)
    l = label.new(bar_index, high)
    label.set_text(l, "sell@\n" + str.tostring(close))
    label.set_color(l, color.red)
    label.set_yloc(l, yloc.belowbar)
    label.set_style(l, label.style_label_down)

'''

Answer 1

你必须写出 MACD 计算公式，所以我创建了一个列表

[ma​​cdline, singalline, ma​​cdhist] = ta.macd(收盘, 12, 26, 9 ）

基本等式是：

fast_length = input.int(title="Fast Length", defval=12)
slow_length = input.int(title="Slow Length", defval=26)
signal_length = input.int(title="Signal Smoothing", minval = 1, maxval = 50, defval = 9)

// Calculating
fast_ma = ta.ema(fast_length)
slow_ma =ta.ema(slow_length)
macd = fast_ma - slow_ma
signal = ta.sma(macd, signal_length)
hist = macd - signal
plot(hist, title="Histogram")
plot(macd, title="MACD")
plot(signal, title="Signal")

我解决了你的代码问题

//@version=5
indicator("My script", overlay=true)


[macdline, singalline, macdhist] = ta.macd(close, 12, 26, 9)

long = macdline > singalline
short = macdline < singalline

if(long)
    l = label.new(bar_index, high)
    label.set_text(l, "buy@\n" + str.tostring(close))
    label.set_color(l, color.green)
    label.set_yloc(l, yloc.belowbar)
    label.set_style(l, label.style_label_up)

if(short)
    l = label.new(bar_index, high)
    label.set_text(l, "sell@\n" + str.tostring(close))
    label.set_color(l, color.red)
    label.set_yloc(l, yloc.abovebar)
    label.set_style(l, label.style_label_down)
    
alertcondition(long, "Macd Long open", "message")
alertcondition(short, "Macd short open", "message")