请求完善TradingView Engulfing蜡烛触碰MA的警报Pine Script代码

问题说明 #

已完成SMMA均线绘制与Engulfing（吞没）蜡烛形态识别，但无法定义吞没蜡烛触碰均线的触发条件，需实现两类警报：

• 多单警报：价格处于200周期SMMA（smma3）上方，且看涨吞没形态触碰21周期SMMA（smma1）时触发
• 空单警报：价格处于200周期SMMA下方，且看跌吞没形态触碰21周期SMMA时触发

现有代码 #

//@version=5
indicator(title="Indicator", shorttitle="Indi", overlay=true, timeframe="", timeframe_gaps=true)
len1 = input.int(21, minval=1, title="Length 21")
len2 = input.int(50, minval=1, title="Length 50")
len3 = input.int(200, minval=1, title="Length 200")
src = input(close, title="Source")
 
smma = 0.0
smma1 := na(smma[1]) ? ta.sma(src, len1) : (smma[1] * (len1 - 1) + src) / len1
smma2 := na(smma[1]) ? ta.sma(src, len2) : (smma[1] * (len2 - 1) + src) / len2
smma3 := na(smma[1]) ? ta.sma(src, len3) : (smma[1] * (len3 - 1) + src) / len3
openBarPrevious = open[1]
closeBarPrevious = close[1]
openBarCurrent = open
closeBarCurrent = close
green = color.green
red = color.red
 
// 看涨吞没形态判定
bullishEngulfing = (openBarCurrent <= closeBarPrevious) and (openBarCurrent < openBarPrevious) and (closeBarCurrent > openBarPrevious)
// 看跌吞没形态判定
bearishEngulfing = (openBarCurrent >= closeBarPrevious) and (openBarCurrent > openBarPrevious) and (closeBarCurrent < openBarPrevious)
 
// 绘制形态标记
plotshape(bullishEngulfing, style = shape.triangleup, location = location.belowbar, color = green, size = size.tiny)
plotshape(bearishEngulfing, style = shape.triangledown , location = location.abovebar, color = red, size = size.tiny)
// 绘制SMMA均线
plot(smma1, color=#ffffff)
plot(smma2, color=#0000FF)
plot(smma3, color=#FF0000)

实现方案（含修改后代码） #

核心逻辑补充 #

1. 吞没形态触碰smma1的条件：蜡烛的价格区间（最低价到最高价）覆盖smma1，即low <= smma1 and high >= smma1
2. 价格相对smma3的位置：多单要求当前收盘价在smma3上方，空单要求收盘价在smma3下方
3. 警报触发逻辑：使用alertcondition()函数绑定触发条件，支持在TradingView中设置对应警报

修改后完整代码 #

//@version=5
indicator(title="Indicator", shorttitle="Indi", overlay=true, timeframe="", timeframe_gaps=true)
len1 = input.int(21, minval=1, title="Length 21")
len2 = input.int(50, minval=1, title="Length 50")
len3 = input.int(200, minval=1, title="Length 200")
src = input(close, title="Source")
 
// 计算SMMA均线
smma = 0.0
smma1 := na(smma[1]) ? ta.sma(src, len1) : (smma[1] * (len1 - 1) + src) / len1
smma2 := na(smma[1]) ? ta.sma(src, len2) : (smma[1] * (len2 - 1) + src) / len2
smma3 := na(smma[1]) ? ta.sma(src, len3) : (smma[1] * (len3 - 1) + src) / len3

// 吞没形态判定
bullishEngulfing = (open <= close[1]) and (open < open[1]) and (close > open[1])
bearishEngulfing = (open >= close[1]) and (open > open[1]) and (close < open[1])

// 补充：吞没形态触碰smma1的条件
bullishEngulfingTouchSMMA1 = bullishEngulfing and (low <= smma1) and (high >= smma1)
bearishEngulfingTouchSMMA1 = bearishEngulfing and (low <= smma1) and (high >= smma1)

// 补充：价格相对smma3的位置条件
priceAboveSMMA3 = close > smma3
priceBelowSMMA3 = close < smma3

// 最终警报触发条件
longAlertCondition = priceAboveSMMA3 and bullishEngulfingTouchSMMA1
shortAlertCondition = priceBelowSMMA3 and bearishEngulfingTouchSMMA1

// 绘制形态标记
plotshape(bullishEngulfing, style = shape.triangleup, location = location.belowbar, color = color.green, size = size.tiny)
plotshape(bearishEngulfing, style = shape.triangledown , location = location.abovebar, color = color.red, size = size.tiny)
// 绘制SMMA均线
plot(smma1, color=#ffffff)
plot(smma2, color=#0000FF)
plot(smma3, color=#FF0000)

// 设置警报
alertcondition(longAlertCondition, title="多单警报", message="价格在200SMMA上方，看涨吞没触碰21SMMA")
alertcondition(shortAlertCondition, title="空单警报", message="价格在200SMMA下方，看跌吞没触碰21SMMA")

额外说明 #

• 若需要更严格的“实体触碰”而非影线触碰，可将触碰条件改为：
  • 看涨吞没：open <= smma1 and close >= smma1
  • 看跌吞没：open >= smma1 and close <= smma1
• 代码简化了原变量命名（如用open直接代替openBarCurrent），更符合Pine Script常规写法
• 添加的alertcondition会在TradingView的警报设置中显示对应选项，可直接配置推送方式

内容的提问来源于stack exchange，提问作者Rachel Bush