نمونه‌ها: اسیلاتورها

// Wilder's Relative Strength Index written out: RS = average gain / average loss and RSI = 100 - 100 / (1 + RS).
// The averages are Wilder's running means (tech.rma), the same smoothing the built-in tech.rsi uses.
indicator "RSI by hand"
    edition = 1
    display = pane

input length: int = 14, name = "Length", min = 2
let change = close - close[1]
let gain = math.max(change, 0)
let loss = math.max(-change, 0)
let average_gain = tech.rma(gain, length)
let average_loss = tech.rma(loss, length)
let strength = average_gain / average_loss
let value = 100 - 100 / (1 + strength)
plot(value, name = "RSI", color = color.purple)
level(70, name = "Overbought", color = color.red, style = dashed)
level(30, name = "Oversold", color = color.green, style = dashed)

// The built-in RSI with two levels, a shaded middle band and a mark each time it leaves a zone.
indicator "RSI zones"
    edition = 1
    display = pane

input length: int = 14, name = "Length", min = 2
input upper: float = 70, name = "Upper level"
input lower: float = 30, name = "Lower level"
let value = tech.rsi(close, length)
let top = level(upper, name = "Upper", color = color.red, style = dashed)
let bottom = level(lower, name = "Lower", color = color.green, style = dashed)
shade(top, bottom, color = color.fade(color.purple, 92), name = "Middle band")
plot(value, name = "RSI", color = color.purple, width = 2)
mark.shape(
    tech.crosses_below(value, upper),
    name = "Leaves overbought",
    shape = triangle_down,
    place = above,
    color = color.red,
)
mark.shape(
    tech.crosses_above(value, lower),
    name = "Leaves oversold",
    shape = triangle_up,
    place = below,
    color = color.green,
)

// MACD: the difference of a fast and a slow EMA, a signal EMA of that difference, and the gap between them as a histogram.
indicator "MACD"
    edition = 1
    display = pane

input fast_length: int = 12, name = "Fast length", min = 1
input slow_length: int = 26, name = "Slow length", min = 2
input signal_length: int = 9, name = "Signal length", min = 1
let (macd_line, signal_line, hist_value) = tech.macd(
    close,
    fast_length = fast_length,
    slow_length = slow_length,
    signal_length = signal_length,
)
plot(
    hist_value,
    name = "Histogram",
    style = histogram,
    color = if hist_value >= 0 then color.green else color.red,
)
plot(macd_line, name = "MACD", color = color.blue)
plot(signal_line, name = "Signal", color = color.orange)

// The stochastic oscillator: where the close sits inside the last `length` bars' range, smoothed into %K and %D.
// raw %K = 100 * (close - lowest low) / (highest high - lowest low)
indicator "Stochastic"
    edition = 1
    display = pane

input length: int = 14, name = "Length", min = 1
input smooth: int = 3, name = "Smoothing", min = 1
let lowest_low = tech.lowest(low, length)
let highest_high = tech.highest(high, length)
let raw = 100 * (close - lowest_low) / (highest_high - lowest_low)
let k = tech.sma(raw, smooth)
let d = tech.sma(k, smooth)
plot(k, name = "%K", color = color.blue)
plot(d, name = "%D", color = color.orange)
level(80, name = "Upper", color = color.gray, style = dashed)
level(20, name = "Lower", color = color.gray, style = dashed)

// A value the script keeps between bars: `state` starts once, `mut` changes it.
// This counts the bars since the close last made a 20-bar high, and resets it on every new high.
indicator "Bars since a high"
    edition = 1
    display = pane

input length: int = 20, name = "Length", min = 2
state count = 0
let new_high = close >= tech.highest(close, length)
if new_high
    count = 0
else
    count += 1
plot(count, name = "Bars since", style = histogram, color = color.teal)