ema20+60+200

// version=5
indicator("Engineer's System: Clean EMA 20 Cross", overlay=true)

// ==========================================
// 1. SETTINGS
// ==========================================
group_ma = "Moving Averages"
maLength = input.int(20, title="Main MA (EMA 20)", group=group_ma)
// ลบ Input EMA 9 ออกแล้ว
ema13Length = input.int(13, title="Short MA (EMA 13)", group=group_ma)
ema60Length = input.int(60, title="Trend MA (EMA 60)", group=group_ma)
ema200Length = input.int(200, title="Filter MA (EMA 200)", group=group_ma)

group_ut = "UT Bot Settings"
ut_key = input.float(1.0, title="Key Value", step=0.1, group=group_ut)
ut_period = input.int(10, title="ATR Period", group=group_ut)
ut_showLine = input.bool(false, title="Show Trailing Line?", group=group_ut)

// ==========================================
// 2. CALCULATIONS
// ==========================================
maVal = ta.ema(close, maLength) // EMA 20
// ลบการคำนวณ EMA 9 ออกแล้ว
ema13Val = ta.ema(close, ema13Length) // EMA 13
ema60Val = ta.ema(close, ema60Length) // EMA 60
ema200Val = ta.ema(close, ema200Length) // EMA 200

// --- Logic สีของเส้น ---

// 1. EMA 200 (Traffic Light)
bool isBullishTrend = ema60Val > ema200Val
color trendColor = isBullishTrend ? color.lime : color.red

// 2. EMA 20 (เปลี่ยนสีตามราคา)
// ถ้า ราคาปิด > EMA 20 เป็นสีฟ้า, ถ้าต่ำกว่าเป็นสีม่วง
bool isPriceAboveMA20 = close >= maVal
color ema20Color = isPriceAboveMA20 ? color.aqua : color.purple

// --- UT Bot Logic ---
xATR = ta.atr(ut_period)
nLoss = ut_key * xATR
src = close
xATRTrailingStop = 0.0
xATRTrailingStop := if src > nz(xATRTrailingStop[1], 0) and src[1] > nz(xATRTrailingStop[1], 0)
math.max(nz(xATRTrailingStop[1]), src - nLoss)
else if src < nz(xATRTrailingStop[1], 0) and src[1] < nz(xATRTrailingStop[1], 0)
math.min(nz(xATRTrailingStop[1]), src + nLoss)
else if src > nz(xATRTrailingStop[1], 0)
src - nLoss
else
src + nLoss
pos = 0
pos := if src[1] < nz(xATRTrailingStop[1], 0) and src > nz(xATRTrailingStop[1], 0)
1
else if src[1] > nz(xATRTrailingStop[1], 0) and src < nz(xATRTrailingStop[1], 0)
-1
else
nz(pos[1], 0)
utBuy = (pos == 1) and (pos[1] == -1)
utSell = (pos == -1) and (pos[1] == 1)

// ==========================================
// 3. PLOTTING
// ==========================================

// Plot EMA 200
plot(ema200Val, title="EMA 200 Traffic", color=trendColor, linewidth=3)

// Plot EMA 60 & 13
plot(ema60Val, title="EMA 60", color=color.blue, linewidth=2)
plot(ema13Val, title="EMA 13", color=color.aqua, linewidth=1)

// --- EMA 20 (พระเอก: เส้นหนา เปลี่ยนสี) ---
plot(maVal, title="EMA 20", color=ema20Color, linewidth=3)

// *** ลบการแสดงผล EMA 9 และ Cloud ออกทั้งหมดแล้ว ***

// ==========================================
// 4. SIGNALS
// ==========================================

// สัญญาณหลัก (Price Cross EMA 20)
trendBuy = ta.crossover(close, maVal) // ราคาปิด ตัดขึ้น EMA 20
trendSell = ta.crossunder(close, maVal) // ราคาปิด ตัดลง EMA 20

plotshape(trendBuy, title="Trend Buy", style=shape.labelup, location=location.belowbar, color=color.lime, text="BUY", textcolor=color.white, size=size.tiny)
plotshape(trendSell, title="Trend Sell", style=shape.labeldown, location=location.abovebar, color=color.red, text="SELL", textcolor=color.white, size=size.tiny)

// UT Bot Signals
plotshape(utBuy, title="UT Bot Buy Dot", style=shape.circle, location=location.belowbar, color=color.lime, size=size.tiny)
plotshape(utSell, title="UT Bot Sell Dot", style=shape.circle, location=location.abovebar, color=color.red, size=size.tiny)

// ==========================================
// 5. ALERTS
// ==========================================

alertcondition(trendBuy, title="Buy Signal", message="Engineer System: BUY (Close > EMA 20) 🚀")
alertcondition(trendSell, title="Sell Signal", message="Engineer System: SELL (Close < EMA 20) 🔻")

alertcondition(utBuy, title="UT Bot Buy Dot", message="UT Bot: BUY Signal 🟢")
alertcondition(utSell, title="UT Bot Sell Dot", message="UT Bot: SELL Signal 🔴")

alertcondition(isBullishTrend and not isBullishTrend[1], title="Trend 200 Bullish", message="Trend Change: EMA 60 Cross Above EMA 200 🟢")
alertcondition(not isBullishTrend and isBullishTrend[1], title="Trend 200 Bearish", message="Trend Change: EMA 60 Cross Below EMA 200 🔴")