Bagaimana Performa dihitung pada Penyaring ?

Data Performa Penyaring dihitung menggunakan rumus ini:

//@version=5
indicator(title="Screener Performance")
fastSearchN(_xs, x, maxbarsback) =>  // xs - sorted, ascending
	xs = _xs
	if bar_index == 0
		xs += xs[maxbarsback] * 0  // max_bars_back
	left = 0
	right = math.min(bar_index, maxbarsback)
	mid = 0
	if xs < x
		0
	else
		for i = 0 to 9 by 1
			mid := math.ceil((left + right) / 2)
			if left == right
				break
			else if xs[mid] < x
				right := mid
				continue
			else if xs[mid] > x
				left := mid
				continue
			else
				break
		mid
years5 = 365 * 4 + 366
years5_ago = timenow - 1000 * 60 * 60 * 24 * years5
countOfBars5YearAgo = fastSearchN(time, years5_ago, years5)
weeks52 = 7 * 52
weeks52_ago = timenow - 1000 * 60 * 60 * 24 * weeks52
countOfBars52WeekAgo = fastSearchN(time, weeks52_ago, weeks52)
month6 = 180
months6_ago = timenow - 1000 * 60 * 60 * 24 * month6
countOfBars6MonthAgo = fastSearchN(time, months6_ago, month6)
month3 = 90
months3_ago = timenow - 1000 * 60 * 60 * 24 * month3
countOfBars3MonthAgo = fastSearchN(time, months3_ago, month3)
month1 = 30
month_ago = timenow - 1000 * 60 * 60 * 24 * month1
month_ago_this_bar = time - 1000 * 60 * 60 * 24 * month1
countOfBars1MonthAgo = fastSearchN(time, month_ago, month1)
countOfBars1MonthAgoThisBar = fastSearchN(time, month_ago_this_bar, month1)
week1 = 7
week_ago = timenow - 1000 * 60 * 60 * 24 * week1
week_ago_this_bar = time - 1000 * 60 * 60 * 24 * week1
countOfBarsWeekAgo = fastSearchN(time, week_ago, week1)
countOfBarsWeekAgoThisBar = fastSearchN(time, week_ago_this_bar, week1)

// performance
rateOfreturn(v1, v2) =>
	(v1 - v2) * 100 / math.abs(v2)
rr(_bb, maxbarsback) =>
	bb = _bb
	if bar_index == 0
		bb += math.round(open[maxbarsback] * 0)  // max_bars_back
	if bb == 0
		na
	else
		rof = rateOfreturn(close, open[bb])
		rof
plot(rr(countOfBarsWeekAgo, week1), title="Perf.W")
plot(rr(countOfBars1MonthAgo, month1), title="Perf.1M")
plot(rr(countOfBars3MonthAgo, month3), title="Perf.3M")
plot(rr(countOfBars6MonthAgo, month6), title="Perf.6M")
plot(rr(countOfBars52WeekAgo, weeks52), title="Perf.Y")
plot(rr(countOfBars5YearAgo, years5), title="Perf.5Y")
var lastYearOpen = open
if year > year[1]
	lastYearOpen := open[1]
plot(rateOfreturn(close, lastYearOpen), title="Perf.YTD")

Catatan: nilai script ini berbeda antara riwayat dan saat ini dikarenakan timenow, lihat https://www.tradingview.com/pine-script-docs/en/v4/essential/Indicator_repainting.html 

Untuk tampilan visual, anda dapat menambahkan script ini ke chart anda melalui Pine Editor menggunakan chart dengan kerangka waktu harian. Indikator akan muncul pada chart, plot akan menunjukkan nilai untuk setiap tipe performa.  

% Perubahan vs % Performa:

Katakanlah hari ini adalah hari Selasa. Perubahan Mingguan menghitung selisih antara penutupan saat ini (Selasa) dan penutupan dari minggu lalu (harga penutupan hari Jumat sebelumnya). Performa Mingguan menghitung selisih antara penutupan saat ini (Selasa) dan penutupan dari seminggu yang lalu tepatnya (Selasa sebelumnya).