Double EMA Pullback - Buy Sell Signal

本页源码来自 TradingView 公开发布的开源脚本，版权归原作者所有， 请遵循其原始许可（Pine 脚本常见 CC BY-NC-SA / MPL-2.0 / MIT）。 本项目仅用于研究检索与许可范围内的移植。

Pine Script

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © hanabil
 
//@version=5
indicator("Double EMA Pullback - Buy Sell Signal", overlay=true, max_labels_count=500)
 
gr0     = 'Pullback'
pbStep  = input(5, 'Backstep of Pullback', group=gr0)
 
gr1     = 'Double EMA'
emaSrc  = input.source(close, 'EMA 1 Source', group=gr1)
emaLen  = input(50, 'EMA 1 Period', group=gr1)
emaCol  = input.color(color.blue, 'EMA 1 Color', group=gr1)
ema1    = ta.ema(emaSrc, emaLen)
plot(ema1, 'EMA 1', color=emaCol)
 
emaSrc1 = input.source(close, 'EMA 2 Source', group=gr1)
emaLen1 = input(200, 'EMA 2 Period', group=gr1)
emaCol1 = input.color(color.red, 'EMA 2 Color', group=gr1)
ema2    = ta.ema(emaSrc1, emaLen1)
plot(ema2, 'EMA 2', color=emaCol1)
 
buySignal   = ta.crossover (close, ema1) and ema1>ema2 and close[pbStep]>ema1
sellSignal  = ta.crossunder(close, ema1) and ema1<ema2 and close[pbStep]<ema1
 
gr4             = 'Styling'
showPattern     = input(true, 'Show Pattern Name', group=gr4)
textCol         = input.color(color.white, 'Text Color', group=gr4)
bullText        = input.string('Buy', 'Buy Signal', inline='ul', group=gr4)
bullCol         = input.color(color.green, '', '', 'ul', gr4)
bearText        = input('Sell', 'Sell Signal', '', 'ms', gr4)
bearCol         = input.color(color.red, '', '', 'ms', gr4)
 
fLabel(x, y)=>
    labelStyle  = y==high? label.style_label_down : label.style_label_up
    labelCol    = y==high? bearCol  : bullCol
    labelText   = y==high? bearText : bullText
    //labelText   = showPattern? labelText_ + pn : labelText_
    if x
        label.new(bar_index, y, labelText, style=labelStyle, color=labelCol, size=size.small, textcolor=textCol)
 
fLabel(buySignal , low )
fLabel(sellSignal, high)
 
alertcondition(buySignal, 'Buy Signal', 'Buy!!')
alertcondition(sellSignal, 'Sell Signal', 'Sell!!')

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