如何将TradingView PineScript V2版EMA脚本转换为V5版本？

转换后的完整V5代码： #

//@version=5
//Original author: Rajandran R
indicator("Supertrend Alerts 1.1", overlay = true)

cand_col = input(title="Color Candles", defval=true)
show_line = input(title="Show Supertrend Line", defval=true)
Factor = input.float(3, title="Factor")
PD = input.int(7, title="Period", minval = 1, maxval = 100)

Up = hl2 - (Factor * ta.atr(PD))
Dn = hl2 + (Factor * ta.atr(PD))

var float TrendUp = na
var float TrendDown = na

TrendUp := close[1] > TrendUp[1] ? math.max(Up, TrendUp[1]) : Up
TrendDown := close[1] < TrendDown[1] ? math.min(Dn, TrendDown[1]) : Dn

var int Trend = 1
Trend := close > TrendDown[1] ? 1 : close < TrendUp[1] ? -1 : Trend[1]
TSL = Trend == 1 ? TrendUp : TrendDown

linecolor = Trend == 1 ? color.new(color.green, 0) : color.new(color.red, 0)
barcolor(cand_col and Trend == 1 ? color.new(color.green, 0) : na)
barcolor(cand_col and Trend == -1 ? color.new(color.red, 0) : na)

plot(show_line ? TSL : na, color = linecolor, style = plot.style_line, linewidth = 2, title = "SuperTrend Line", transp=65)

newup = ta.crossover(close, TSL)
newdn = ta.crossunder(close, TSL)

plotshape(newup, title="Long", shape=shape.triangleup, location=location.belowbar, color=color.new(color.green, 0), size=size.normal)
plotshape(newdn, title="Short", shape=shape.triangledown, location=location.abovebar, color=color.new(color.red, 0), size=size.normal)

alertcondition(newup, title='Supertrend Long', message='Supertrend: Long ')
alertcondition(newdn, title='Supertrend Short', message='Supertrend: Short ')
alertcondition(newup or newdn, title='Supertrend Signal', message='Supertrend: Long or Short ')

关键转换说明： #

• 版本与入口函数：将//@version=2改为//@version=5，study()替换为V5标准的indicator()
• 输入系统升级：使用input.float()/input.int()替代旧版输入声明，布尔型输入无需指定类型，自动推断
• 命名空间规范：技术指标函数（如atr()）归属ta命名空间，数学函数（如max()）归属math命名空间
• 变量初始化：用var关键字声明趋势变量，确保仅初始化一次，适配V5变量作用域规则
• 赋值语法：使用:=进行变量重新赋值，区分初始化与更新操作
• 颜色与样式：用color.new()处理颜色透明度，绘图样式常量添加plot.命名空间前缀
• 交叉逻辑简化：用ta.crossover()/ta.crossunder()替代原交叉判断，语义更清晰

内容的提问来源于stack exchange，提问作者diazluise