//@version=5
indicator("Bullmania Money Line v4", overlay=true)

// Base inputs
atrPeriod = input.int(10, "ATR Period", minval=1)
multiplier = input.float(3.0, "Multiplier", minval=0.1, step=0.1)

// Noise reduction (optional) - defaults preserve v1 behavior
confirmBars = input.int(1, "Flip confirmation bars", minval=1, maxval=5, tooltip="Require this many consecutive closes beyond the Money Line before flipping trend. 1 = v1 behavior.")
bufferATR = input.float(0.0, "Flip buffer (×ATR)", minval=0.0, step=0.05, tooltip="Extra distance beyond the Money Line required to flip. Example: 0.3 means close must cross by 0.3 × ATR.")

atr = ta.atr(atrPeriod)
src = (high + low) / 2

up = src - (multiplier * atr)
dn = src + (multiplier * atr)

var float up1 = na
var float dn1 = na

up1 := nz(up1[1], up)
dn1 := nz(dn1[1], dn)

up1 := close[1] > up1 ? math.max(up, up1) : up
dn1 := close[1] < dn1 ? math.min(dn, dn1) : dn

var int trend = 1
var float tsl = na
var int buyCount = 0
var int sellCount = 0

tsl := nz(tsl[1], up1)

if trend == 1
    tsl := math.max(up1, tsl)
    // Buffered cross + confirmation for flip down
    sellCross = close < (tsl - bufferATR * atr)
    sellCount := sellCross ? sellCount + 1 : 0
    trend := sellCount >= confirmBars ? -1 : 1
    if trend == -1
        buyCount := 0
else
    tsl := math.min(dn1, tsl)
    // Buffered cross + confirmation for flip up
    buyCross = close > (tsl + bufferATR * atr)
    buyCount := buyCross ? buyCount + 1 : 0
    trend := buyCount >= confirmBars ? 1 : -1
    if trend == 1
        sellCount := 0

supertrend = tsl

// Plot the Money Line
upTrend = trend == 1 ? supertrend : na
downTrend = trend == -1 ? supertrend : na

plot(upTrend, "Up Trend", color=color.new(color.green, 0), style=plot.style_linebr, linewidth=2)
plot(downTrend, "Down Trend", color=color.new(color.red, 0), style=plot.style_linebr, linewidth=2)

// Plot buy/sell signals
plotshape(trend == 1 and trend[1] == -1, title="Buy Signal", location=location.belowbar, color=color.green, style=shape.circle, size=size.small)
plotshape(trend == -1 and trend[1] == 1, title="Sell Signal", location=location.abovebar, color=color.red, style=shape.circle, size=size.small)

// Fill area between price and Money Line
fill(plot(close, display=display.none), plot(upTrend, display=display.none), color=color.new(color.green, 90))
fill(plot(close, display=display.none), plot(downTrend, display=display.none), color=color.new(color.red, 90))