SMC BOS/CHoCH + Auto Fib (5m/any TF) durane

//version=6
indicator('SMC BOS/CHoCH + Auto Fib (5m/any TF)', overlay = true, max_lines_count = 200, max_labels_count = 200)

// --------- Inputs ----------
left = input.int(3, 'Pivot Left', minval = 1)
right = input.int(3, 'Pivot Right', minval = 1)
minSwingSize = input.float(0.0, 'Min swing size (price units, 0 = disabled)', step = 0.1)
fib_levels = input.string('0.0,0.236,0.382,0.5,0.618,0.786,1.0', 'Fibonacci levels (comma separated)')
show_labels = input.bool(true, 'Show BOS/CHoCH labels')
lookbackHighLow = input.int(200, 'Lookback for structure (bars)')

// Parse fib levels
strs = str.split(fib_levels, ',')
var array<float> fibs = array.new_float()
if barstate.isfirst
for s in strs
array.push(fibs, str.tonumber(str.trim(s)))

// --------- Find pivot highs / lows ----------
pHigh = ta.pivothigh(high, left, right)
pLow = ta.pivotlow(low, left, right)

// store last confirmed swings
var float lastSwingHighPrice = na
var int lastSwingHighBar = na
var float lastSwingLowPrice = na
var int lastSwingLowBar = na

if not na(pHigh)
// check min size
if minSwingSize == 0 or pHigh - nz(lastSwingLowPrice, pHigh) >= minSwingSize
lastSwingHighPrice := pHigh
lastSwingHighBar := bar_index - right
lastSwingHighBar

if not na(pLow)
if minSwingSize == 0 or nz(lastSwingHighPrice, pLow) - pLow >= minSwingSize
lastSwingLowPrice := pLow
lastSwingLowBar := bar_index - right
lastSwingLowBar

// --------- Detect BOS & CHoCH (simple robust logic) ----------
var int lastBOSdir = 0 // 1 = bullish BOS (price broke above), -1 = bearish BOS
var int lastBOSbar = na
var float lastBOSprice = na

// Look for price closes beyond last structural swings within lookback
// Bullish BOS: close > recent swing high
condBullBOS = not na(lastSwingHighPrice) and close > lastSwingHighPrice and bar_index - lastSwingHighBar <= lookbackHighLow
// Bearish BOS: close < recent swing low
condBearBOS = not na(lastSwingLowPrice) and close < lastSwingLowPrice and bar_index - lastSwingLowBar <= lookbackHighLow

bosTriggered = false
chochTriggered = false
if condBullBOS
bosTriggered := true
if lastBOSdir != 1
// if previous BOS direction was -1, this is CHoCH (change of character)
chochTriggered := lastBOSdir == -1
chochTriggered
lastBOSdir := 1
lastBOSbar := bar_index
lastBOSprice := close
lastBOSprice

if condBearBOS
bosTriggered := true
if lastBOSdir != -1
chochTriggered := lastBOSdir == 1
chochTriggered
lastBOSdir := -1
lastBOSbar := bar_index
lastBOSprice := close
lastBOSprice

// --------- Plot labels for BOS / CHoCH ----------
if bosTriggered and show_labels
if chochTriggered
label.new(bar_index, high, text = lastBOSdir == 1 ? 'CHoCH ↑' : 'CHoCH ↓', style = label.style_label_up, color = color.new(color.orange, 0), textcolor = color.white, yloc = yloc.abovebar)
else
label.new(bar_index, high, text = lastBOSdir == 1 ? 'BOS ↑' : 'BOS ↓', style = label.style_label_left, color = lastBOSdir == 1 ? color.green : color.red, textcolor = color.white, yloc = yloc.abovebar)

// --------- Auto Fibonacci drawing ----------
var array<line> fib_lines = array.new_line()
var array<label> fib_labels = array.new_label()
var int lastFibId = na

// Function to clear previous fibs
f_clear() =>
if array.size(fib_lines) > 0
for i = 0 to array.size(fib_lines) - 1
line.delete(array.get(fib_lines, i))
if array.size(fib_labels) > 0
for i = 0 to array.size(fib_labels) - 1
label.delete(array.get(fib_labels, i))
array.clear(fib_lines)
array.clear(fib_labels)

// Decide anchors for fib: if lastBOSdir==1 (bullish) anchor from lastSwingLow -> lastSwingHigh
// if lastBOSdir==-1 (bearish) anchor from lastSwingHigh -> lastSwingLow
if lastBOSdir == 1 and not na(lastSwingLowPrice) and not na(lastSwingHighPrice)
// bullish fib: low -> high
startPrice = lastSwingLowPrice
endPrice = lastSwingHighPrice
// draw
f_clear()
for i = 0 to array.size(fibs) - 1 by 1
lvl = array.get(fibs, i)
priceLevel = startPrice + (endPrice - startPrice) * lvl
ln = line.new(x1 = lastSwingLowBar, y1 = priceLevel, x2 = bar_index, y2 = priceLevel, xloc = xloc.bar_index, extend = extend.right, color = color.new(color.green, 60), width = 1, style = line.style_solid)
array.push(fib_lines, ln)
lab = label.new(bar_index, priceLevel, text = str.tostring(lvl * 100, '#.0') + '%', style = label.style_label_right, color = color.new(color.green, 80), textcolor = color.white, yloc = yloc.price)
array.push(fib_labels, lab)

if lastBOSdir == -1 and not na(lastSwingHighPrice) and not na(lastSwingLowPrice)
// bearish fib: high -> low
startPrice = lastSwingHighPrice
endPrice = lastSwingLowPrice
f_clear()
for i = 0 to array.size(fibs) - 1 by 1
lvl = array.get(fibs, i)
priceLevel = startPrice + (endPrice - startPrice) * lvl
ln = line.new(x1 = lastSwingHighBar, y1 = priceLevel, x2 = bar_index, y2 = priceLevel, xloc = xloc.bar_index, extend = extend.right, color = color.new(color.red, 60), width = 1, style = line.style_solid)
array.push(fib_lines, ln)
lab = label.new(bar_index, priceLevel, text = str.tostring(lvl * 100, '#.0') + '%', style = label.style_label_right, color = color.new(color.red, 80), textcolor = color.white, yloc = yloc.price)
array.push(fib_labels, lab)

// --------- Optional: plot lastSwing points ----------
plotshape(not na(lastSwingHighPrice) ? lastSwingHighPrice : na, title = 'LastSwingHigh', location = location.absolute, style = shape.triangledown, size = size.tiny, color = color.red, offset = 0)
plotshape(not na(lastSwingLowPrice) ? lastSwingLowPrice : na, title = 'LastSwingLow', location = location.absolute, style = shape.triangleup, size = size.tiny, color = color.green, offset = 0)

// --------- Alerts ----------
alertcondition(bosTriggered and lastBOSdir == 1, title = 'Bullish BOS', message = 'Bullish BOS detected on {{ticker}} @ {{close}}')
alertcondition(bosTriggered and lastBOSdir == -1, title = 'Bearish BOS', message = 'Bearish BOS detected on {{ticker}} @ {{close}}')
alertcondition(chochTriggered, title = 'CHoCH Detected', message = 'CHoCH detected on {{ticker}} @ {{close}}')

// End