Minho Index | SETUP (Safe Filter 90%)

//version=5
indicator("Minho Index | SETUP (Safe Filter 90%)", shorttitle="Minho Index | SETUP+", overlay=false)


//--------------------------------------------------------
// ⚙️ INPUTS
//--------------------------------------------------------
bullColor = input.color(color.new(color.lime, 0), "Bull Color (Minho Green)")
bearColor = input.color(color.new(color.red, 0), "Bear Color (Red)")
neutralColor = input.color(color.new(color.white, 0), "Neutral Color (White)")
lineWidth = input.int(2, "Line Width")
period = input.int(14, "RSI Period")
centerLine = input.float(50.0, "Central Line (Fixed at 50)")


//--------------------------------------------------------
// 🧠 BASE RSI + INTERNAL SMOOTHING
//--------------------------------------------------------
rsiBase = ta.rsi(close, period)
rsiSmooth = ta.sma(rsiBase, 3) // light smoothing


//--------------------------------------------------------
// 🔍 TREND DETECTION AND NEUTRAL ZONE
//--------------------------------------------------------
trendUp = (rsiSmooth > rsiSmooth[1]) and (rsiSmooth[1] > rsiSmooth[2])
trendDown = (rsiSmooth < rsiSmooth[1]) and (rsiSmooth[1] < rsiSmooth[2])
slopeUp = (rsiSmooth > rsiSmooth[1])
slopeDown = (rsiSmooth < rsiSmooth[1])

lineColor = neutralColor
if trendUp
lineColor := bullColor
else if trendDown
lineColor := bearColor
else if slopeUp or slopeDown
lineColor := neutralColor


//--------------------------------------------------------
// 📈 MAIN INDEX LINE
//--------------------------------------------------------
plot(rsiSmooth, title="Dynamic RSI Line (Safe Filter)", color=lineColor, linewidth=lineWidth)


//--------------------------------------------------------
// ⚪ FIXED CENTRAL LINE
//--------------------------------------------------------
plot(centerLine, title="Central Line (Highlight)", color=neutralColor, linewidth=1)


//--------------------------------------------------------
// 📊 NORMALIZED MOVING AVERAGES (SMA20 and EMA20)
//--------------------------------------------------------
SMA20 = ta.sma(close, 20)
EMA20 = ta.ema(close, 20)

// Normalization 0–100
minPrice = ta.lowest(low, 100)
maxPrice = ta.highest(high, 100)

rangeCalc = maxPrice - minPrice
rangeCalc := rangeCalc == 0 ? 1 : rangeCalc

normSMA = ((SMA20 - minPrice) / rangeCalc) * 100
normEMA = ((EMA20 - minPrice) / rangeCalc) * 100


//--------------------------------------------------------
// 🩶 MOVING AVERAGES PLOTS (GHOST-GREY STYLE)
//--------------------------------------------------------
ghostColor = color.new(color.rgb(200,200,200), 65)
plot(normSMA, title="SMA 20 (Ghost Grey)", color=ghostColor, linewidth=2)
plot(normEMA, title="EMA 20 (Ghost Grey)", color=ghostColor, linewidth=2)


//--------------------------------------------------------
// 🌈 FILL BETWEEN MOVING AVERAGES
//--------------------------------------------------------
bullCond = normSMA < normEMA
bearCond = normSMA > normEMA

fill(
plot(normSMA, display=display.none),
plot(normEMA, display=display.none),
color = bearCond ? color.new(color.red, 55) :
bullCond ? color.new(color.lime, 55) : na
)


//--------------------------------------------------------
// ✅ END OF INDICATOR
//--------------------------------------------------------