Breakout buy and sell

//version=6
indicator("突破 + 反轉指標（嚴格版）", overlay=true)

// 均線計算
ma5 = ta.sma(close, 5)
ma20 = ta.sma(close, 20)
ma_cross_up = ta.crossover(ma5, ma20)
ma_cross_down = ta.crossunder(ma5, ma20)

// 成交量判斷（嚴格：放量 1.5 倍以上）
vol = volume
vol_avg = ta.sma(vol, 20)
vol_increase = vol > vol_avg * 1.5

// 價格突破（嚴格：創 20 根新高/新低）
price_breakout_up = close > ta.highest(close, 20)
price_breakout_down = close < ta.lowest(close, 20)

// KDJ 隨機指標（抓反轉）
k = ta.stoch(close, high, low, 14)
d = ta.sma(k, 3)
kd_cross_up = ta.crossover(k, d)
kd_cross_down = ta.crossunder(k, d)

// 時間過濾（美股正規交易時段）
isRegularSession = (hour >= 14 and hour < 21) or (hour == 21 and minute == 0)

// 冷卻時間（避免連續訊號）
var int lastEntryBar = na
var int lastExitBar = na
entryCooldown = na(lastEntryBar) or (bar_index - lastEntryBar > 5)
exitCooldown = na(lastExitBar) or (bar_index - lastExitBar > 5)

// 嚴格進場條件
entryBreakout = ma_cross_up and vol_increase and price_breakout_up
entryReversal = kd_cross_up
entrySignal = (entryBreakout or entryReversal) and isRegularSession and entryCooldown

// 嚴格出場條件
exitBreakdown = ma_cross_down and vol_increase and price_breakout_down
exitReversal = kd_cross_down
exitSignal = (exitBreakdown or exitReversal) and isRegularSession and exitCooldown

// 更新冷卻時間
if entrySignal
lastEntryBar := bar_index
if exitSignal
lastExitBar := bar_index

// 顯示訊號
plotshape(entrySignal, location=location.belowbar, color=color.green, style=shape.labelup, title="進場訊號", text="買入")
plotshape(exitSignal, location=location.abovebar, color=color.red, style=shape.labeldown, title="出場訊號", text="賣出")

// 均線顯示
plot(ma5, color=color.orange, title="5MA")
plot(ma20, color=color.blue, title="20MA")

// 提醒條件（alertcondition）
alertcondition(entrySignal, title="買入訊號", message="出現買入訊號")
alertcondition(exitSignal, title="賣出訊號", message="出現賣出訊號")