AlgoRanger Fibonacci Synthesis

//version=5
indicator("AlgoRanger Fibonacci Synthesis", overlay=true)

// --- Inputs for Supertrend ---
atrPeriod = input(10, title="ATR Period")
factor = input.float(3.0, title="Multiplier", step=0.1)

// --- Calculate Supertrend ---
[supertrend, direction] = ta.supertrend(factor, atrPeriod)

// --- Plot Supertrend ---
uptrend = direction > 0 ? supertrend : na
downtrend = direction < 0 ? supertrend : na

plot(uptrend, "Uptrend", color=color.green, linewidth=2)
plot(downtrend, "Downtrend", color=color.red, linewidth=2)

// --- Fibonacci Retracement Levels ---
fibLevels = array.new_float()
array.push(fibLevels, 0.0) // Low (0%)
array.push(fibLevels, 0.236) // 23.6%
array.push(fibLevels, 0.382) // 38.2%
array.push(fibLevels, 0.5) // 50%
array.push(fibLevels, 0.618) // 61.8%
array.push(fibLevels, 0.786) // 78.6%
array.push(fibLevels, 1.0) // High (100%)

// --- Detect Swing High & Swing Low (last 50 bars) ---
swingHigh = ta.highest(high, 50)
swingLow = ta.lowest(low, 50)

// --- Draw Fibonacci Retracement ---
if barstate.islast
fibStart = swingHigh
fibEnd = swingLow

// Adjust if trend is bullish/bearish
if direction > 0 // Uptrend (use recent low as base)
fibStart := swingLow
fibEnd := swingHigh

fibDiff = fibEnd - fibStart

// Plot Fibonacci Levels
for i = 0 to array.size(fibLevels) - 1
level = array.get(fibLevels, i)
priceLevel = fibStart + (fibDiff * level)

// Customize line color/style
lineColor = level == 0.0 or level == 1.0 ? color.blue :
level == 0.382 or level == 0.618 ? color.purple :
color.gray

line.new(bar_index - 50, priceLevel, bar_index, priceLevel,
color=lineColor, width=1, style=level == 0.0 or level == 1.0 ? line.style_solid : line.style_dashed)

// Label Fibonacci Levels
label.new(bar_index, priceLevel, str.tostring(level * 100, "#.##") + "%",
color=lineColor, style=label.style_label_left, textcolor=color.white)