Indicator Template

//@version=6
// Indicator template — signals, levels, alerts, and an info table.
// Companion to strategy.pine. One script per file: if you need a backtest
// too, that is a second file.
indicator("Indicator Template", overlay = true, max_labels_count = 500)

// ── Inputs ──────────────────────────────────────────────────────────────────
fastLen  = input.int(9,     "Fast EMA",      minval = 1)
slowLen  = input.int(21,    "Slow EMA",      minval = 1)
rsiLen   = input.int(14,    "RSI length",    minval = 1)
atrLen   = input.int(14,    "ATR length",    minval = 1)
atrMult  = input.float(1.5, "Stop (ATR x)",  minval = 0.1, step = 0.1)
rr       = input.float(2.0, "Reward:Risk",   minval = 0.1, step = 0.1)
showLbls = input.bool(true, "Show signal labels")

// ── Indicators ──────────────────────────────────────────────────────────────
fastEma = ta.ema(close, fastLen)
slowEma = ta.ema(close, slowLen)
rsiVal  = ta.rsi(close, rsiLen)
atr     = ta.atr(atrLen)

// ── Signals ─────────────────────────────────────────────────────────────────
// barstate.isconfirmed keeps live signals from flickering as the bar forms.
longSignal  = ta.crossover(fastEma, slowEma)  and rsiVal > 50 and barstate.isconfirmed
shortSignal = ta.crossunder(fastEma, slowEma) and rsiVal < 50 and barstate.isconfirmed

// ── Levels ──────────────────────────────────────────────────────────────────
var float entryPx = na
var float stopPx  = na
var float tgtPx   = na

if longSignal
    entryPx := close
    stopPx  := close - atr * atrMult
    tgtPx   := close + atr * atrMult * rr
else if shortSignal
    entryPx := close
    stopPx  := close + atr * atrMult
    tgtPx   := close - atr * atrMult * rr

// ── Plots ───────────────────────────────────────────────────────────────────
plot(fastEma, "Fast EMA", color.new(color.aqua,   0))
plot(slowEma, "Slow EMA", color.new(color.orange, 0))

plotshape(longSignal,  "Long",  shape.triangleup,   location.belowbar, color.new(color.green, 0), size = size.small)
plotshape(shortSignal, "Short", shape.triangledown, location.abovebar, color.new(color.red,   0), size = size.small)

if showLbls and longSignal
    label.new(bar_index, low,  "LONG\nSL " + str.tostring(stopPx, format.mintick) + "\nTP " + str.tostring(tgtPx, format.mintick),
              style = label.style_label_up,   color = color.new(color.green, 20), textcolor = color.white, size = size.small)
if showLbls and shortSignal
    label.new(bar_index, high, "SHORT\nSL " + str.tostring(stopPx, format.mintick) + "\nTP " + str.tostring(tgtPx, format.mintick),
              style = label.style_label_down, color = color.new(color.red,   20), textcolor = color.white, size = size.small)

// ── Alerts ──────────────────────────────────────────────────────────────────
// alert() over alertcondition(): the message is built at runtime, so it can
// carry live prices. alertcondition() needs a compile-time constant string.
if longSignal
    alert("LONG " + syminfo.ticker + " @ " + str.tostring(close, format.mintick) +
          " | SL " + str.tostring(stopPx, format.mintick) +
          " | TP " + str.tostring(tgtPx,  format.mintick), alert.freq_once_per_bar_close)
if shortSignal
    alert("SHORT " + syminfo.ticker + " @ " + str.tostring(close, format.mintick) +
          " | SL " + str.tostring(stopPx, format.mintick) +
          " | TP " + str.tostring(tgtPx,  format.mintick), alert.freq_once_per_bar_close)

// ── Info table ──────────────────────────────────────────────────────────────
if barstate.islast
    var table info = table.new(position.top_right, 2, 4, border_width = 1)
    table.cell(info, 0, 0, "RSI",   text_color = color.white)
    table.cell(info, 1, 0, str.tostring(rsiVal, "#.#"),          text_color = color.white)
    table.cell(info, 0, 1, "ATR",   text_color = color.white)
    table.cell(info, 1, 1, str.tostring(atr, format.mintick),    text_color = color.white)
    table.cell(info, 0, 2, "Stop",  text_color = color.white)
    table.cell(info, 1, 2, str.tostring(stopPx, format.mintick), text_color = color.white)
    table.cell(info, 0, 3, "Target", text_color = color.white)
    table.cell(info, 1, 3, str.tostring(tgtPx, format.mintick),  text_color = color.white)