TradingView Pine-Scrip:如何仅绘制最后x个周期 [英] Tradingview Pine-Script: How to plot only the last x periods
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问题描述
我只想绘制最后x个周期的指标。 我该怎么做?
如果我可以进行时间运算(从plotStartDate减去x*Period),也许我可以使用以下代码:
period = timeframe.ismonthly or timeframe.isweekly ? "12M" : "M"
plotStartDate = timestamp(year(timenow), month(timenow), dayofmonth(timenow), 00, 00)
isPlotDate = time >= plotStartDate
plot(isPlotDate ? mydata : na, color=mydata != mydata[1]:na, style=plot.style_line, linewidth=2)
推荐答案
版本1
我不确定这就是您要找的。它使用plot()
的show_last=
参数来限制满足isPlotDate
约束后绘制的最后条形图的数量:
//@version=4
study("", "", true)
xPeriods = input(10)
plotStartDate = timestamp(year(timenow), month(timenow), dayofmonth(timenow), 00, 00)
isPlotDate = time >= plotStartDate
plot(isPlotDate ? close : na, show_last = xPeriods)
版本2
//@version=4
study("Plot starting n months back", "", true)
monthsBack = input(3, minval = 0)
monthsExtra = monthsBack % 12
monthsExcedent = month(timenow) - monthsExtra
yearsBack = floor(monthsBack / 12) + (monthsExcedent <= 0 ? 1 : 0)
targetMonth = monthsExcedent <= 0 ? 12 + monthsExcedent : monthsExcedent
targetYearMonth = year == year(timenow) - yearsBack and month == targetMonth
beginMonth = not targetYearMonth[1] and targetYearMonth
var float valueToPlot = na
if beginMonth
valueToPlot := high
plot(valueToPlot)
bgcolor(beginMonth ? color.green : na)
版本3
更简单:
//@version=4
study("Plot starting n months back", "", true)
monthsBack = input(3, minval = 0)
targetDate = time >= timestamp(year(timenow), month(timenow) - monthsBack, 1, 0, 0, 0)
beginMonth = not targetDate[1] and targetDate
var float valueToPlot = na
if beginMonth
valueToPlot := high
plot(valueToPlot)
bgcolor(beginMonth ? color.green : na)
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