如何用Pine Script实现买卖信号的交替循环编号

完全可以实现你需要的交替编号信号逻辑。下面是修改后的完整脚本，以及关键改动的说明：

修改后的完整脚本 #

// Smooth Average Range
source = input(close, title="Source")
per1 = input(defval=27, minval=1, title="Fast period")
mult1 = input(defval=1.6, minval=0.1, title="Fast range")

per2 = input(defval=55, minval=1, title="Slow period")
mult2 = input(defval=2, minval=0.1, title="Slow range")

smoothrng(x, t, m) =>
    wper = t * 2 - 1
    avrng = ema(abs(x - x[1]), t)
    smoothrng = ema(avrng, wper) * m
    smoothrng
smrng1 = smoothrng(source, per1, mult1)
smrng2 = smoothrng(source, per2, mult2)
smrng = (smrng1 + smrng2) / 2

// Range Filter
rngfilt(x, r) =>
    rngfilt = x
    rngfilt := x > nz(rngfilt[1]) ? x - r < nz(rngfilt[1]) ? nz(rngfilt[1]) : x - r : 
       x + r > nz(rngfilt[1]) ? nz(rngfilt[1]) : x + r
    rngfilt
filt = rngfilt(source, smrng)

upward = 0.0
upward := filt > filt[1] ? nz(upward[1]) + 1 : filt < filt[1] ? 0 : nz(upward[1])
downward = 0.0
downward := filt < filt[1] ? nz(downward[1]) + 1 : filt > filt[1] ? 0 : nz(downward[1])

hband = filt + smrng
lband = filt - smrng

longCond = bool(na)
shortCond = bool(na)
longCond := source > filt and source > source[1] and upward > 0 or source > filt and source < source[1] and upward > 0
shortCond := source < filt and source < source[1] and downward > 0 or source < filt and source > source[1] and downward > 0

CondIni = 0
CondIni := longCond ? 1 : shortCond ? -1 : CondIni[1]

long = longCond and CondIni[1] == -1
short = shortCond and CondIni[1] == 1

// 新增：跟踪信号编号，实现1→2→1的交替循环
signalNumber = 1
signalNumber := short ? (signalNumber[1] == 1 ? 2 : 1) : nz(signalNumber[1], 1)

// Plotting - 显示带编号的信号
plotshape(long, title="Long", text="Long" + str.tostring(signalNumber), style=shape.labelup, textcolor=color.black, size=size.tiny, location=location.belowbar, color=color.lime, transp=0)
plotshape(short, title="Short", text="Short" + str.tostring(signalNumber), style=shape.labeldown, textcolor=color.white, size=size.tiny, location=location.abovebar, color=color.red, transp=0)

// Alerts - 带编号的预警信息
alertcondition(long, title="Long " + str.tostring(signalNumber), message="Long " + str.tostring(signalNumber))
alertcondition(short, title="Short " + str.tostring(signalNumber), message="Short " + str.tostring(signalNumber))

关键改动说明 #

1. 新增信号编号跟踪变量

   • 添加了signalNumber变量，初始值为1
   • 每次触发空单（short）信号时，自动切换编号：1→2→1循环
   • 保证多单和对应的空单使用相同编号（Long1对应Short1，Long2对应Short2）

2. 修改信号显示文本

   • 将plotshape的text参数修改为"Long" + str.tostring(signalNumber)和"Short" + str.tostring(signalNumber)，实现编号显示

3. 更新预警信息

   • 预警的标题和消息也添加了编号，方便接收预警时区分信号序列

4. 修复原脚本小问题

   • 补充了原脚本缺失的source输入变量，避免运行报错

内容的提问来源于stack exchange，提问作者Jimmy Lee