如何在 Tradingview Pine Script 中绘制 X 根蜡烛的百分比变化？

【问题标题】：How to plot % change across X candles in Tradingview Pine Script?如何在 Tradingview Pine Script 中绘制 X 根蜡烛的百分比变化？
【发布时间】：2021-11-02 07:07:15
【问题描述】：

所以我只是想在收盘价在 5 根蜡烛上变化 20% 的位置下方绘制绿色三角形。 Pine 脚本给出了 plotshape 的语法错误。你不能在 plotshape 中设置条件吗？

study(title="20% change in 5 candles", overlay=true)

var Diff = 0
var PercentChange = 0

// Identify % change 5 candles away
Diff = close - close[5]
PercentChange = Diff / close[5]

// Plot signals to chart
   plotshape(series=PercentChange > 0.2, title="Here", location=location.belowbar, color=color.green, style=shape.triangleup, text="here")

// Send out an alert if this candle meets our conditions
alertcondition(PercentChange > 0.2, title="20% change in 5 candles!", message="20% change in 5 candles")

【问题讨论】：

标签： plot syntax-error pine-script

【解决方案1】：

var Diff = 0 和 var PercentChange 初始化为 int，但后来您将其分配给 float 的关闭值。采用 var float = 0 或 var Diff = 0.0。
稍后您需要使用 := 运算符而不是 = 重新分配 var 值： Diff := close - close[5]。
plotshape 函数前错误的额外缩进。

//@version=4
study(title="20% change in 5 candles", overlay=true)

var float Diff = 0
var PercentChange = 0.0

// Identify % change 5 candles away
Diff := close - close[5]
PercentChange := Diff / close[5]

// Plot signals to chart
plotshape(series=PercentChange > 0.2, title="Here", location=location.belowbar, color=color.green, style=shape.triangleup, text="here")

// Send out an alert if this candle meets our conditions
alertcondition(PercentChange > 0.2, title="20% change in 5 candles!", message="20% change in 5 candles")

【讨论】：