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  2. Williams%R-平滑策略

Williams%R-平滑策略

Author: 雨幕（youquant）, Date: 2022-06-06 12:02:25
Tags: EMA

根据TradingView的描述： Williams%R（%R）是一种基于动量的振荡器，用于技术分析，主要用于识别超买和超卖情况。%R基于当前收盘价与用户定义的回望期内的最高收盘价之间的比较。%R在0和-100之间波动（注意负值），读数接近零表示超买情况更多，读数接近-100表示超卖。通常%R可以根据超买和超卖情况以及动量的整体变化生成设置。

有什么特别的？ 该指标在原来的Williams%R指标上增加了两条额外的EMA线。默认EMA长度为5和13。结果是2条更平滑的平均线，更容易阅读。 该指标包括： -EMA交叉信号。均线交叉有助于表明已确认的趋势变化。默认颜色为绿色和红色 -更快的均线上的趋势反转信号。默认颜色为蓝色和橙色

牛市/熊市交叉和反转警报可用。

享受~~！

回测测试

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/*backtest
start: 2021-12-01 09:00:00
end: 2022-06-05 15:00:00
period: 1d
basePeriod: 1h
exchanges: [{"eid":"Futures_CTP","currency":"FUTURES"}]
*/

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © platsn

//@version=5
indicator(title='Williams %R - Smoothed', shorttitle='The Smooth Willy')

// Williams %R
length = input.int(defval=34, minval=1, title="周期")
upper = ta.highest(length)
lower = ta.lowest(length)

output = 100 * (close - upper) / (upper - lower)

fast_period = input(defval=5, title='Smoothed %R 周期')
slow_period = input(defval=13, title='慢线 EMA 周期')

fast_ema = ta.wma(output,fast_period)
slow_ema = ta.ema(output,slow_period)

// Plot
//h1 = hline(-20, title='Upper Band')
//h2 = hline(-80, title='Lower Band')
//fill(h1, h2, title='Background', transp=90)

plot(output, title='%R', color=color.new(color.white, 80), linewidth=1)
plot(fast_ema, title='Smoothed %R', color=color.new(color.yellow, 0), linewidth=2)
plot(slow_ema, title='Slow EMA', color=color.new(color.aqua, 0), linewidth=2)

bullX = ta.crossover(fast_ema, slow_ema)
bearX = ta.crossunder(fast_ema, slow_ema)
bullreverse = fast_ema[2] > fast_ema[1] and fast_ema > fast_ema[1] and fast_ema < -30
bearreverse = fast_ema[2] < fast_ema[1] and fast_ema < fast_ema[1] and fast_ema > -70

plotX = input.bool(true, "显示 EMA 交叉")
plotRev = input.bool(true, "显示 趋势 反转")

//plotshape(plotX and bearX ,"Cross down", color=color.red, style=shape.triangledown, location = location.top, size =size.tiny, offset=-1) 
//plotshape(plotX and bullX ,"Cross up", color=color.green, style=shape.triangleup, location = location.bottom, size =size.tiny, offset=-1)
//plotshape(plotRev and bearreverse ,"Bear reversal", color=color.orange, style=shape.triangledown, location = location.top, size =size.tiny, offset=-1) 
//plotshape(plotRev and bullreverse ,"Bull reversal", color=color.blue, style=shape.triangleup, location = location.bottom, size =size.tiny, offset=-1)

//alertcondition(bearX,"Bearish Crossover", "Bearish cross on William %R")
//alertcondition(bullX,"Bullish Crossover", "Bullish cross on William %R")
//alertcondition(bearreverse,"Bearish Reversal", "Bearish Reversal on William %R")
//alertcondition(bullreverse,"Billish Reversal", "Bullish Reversal on William %R")

if plotRev and bullreverse
    strategy.entry("Enter Long", strategy.long)
else if plotRev and bearreverse
    strategy.entry("Enter Short", strategy.short)
template: strategy.tpl:40:21: executing "strategy.tpl" at <.api.GetStrategyListByName>: wrong number of args for GetStrategyListByName: want 7 got 6