//@version=5
strategy("Pinbar Basic Strategy (1:1 RR)", overlay=true, initial_capital=10000, calc_on_every_tick=false, pyramiding=0)

// ===== 参数 =====
pinbarBodyRatio     = input.float(0.30, "PinbarBodyRatio", minval=0, maxval=1.0)
pinbarShadowRatio   = input.float(0.60, "PinbarShadowRatio", minval=0, maxval=1.0)
minPinbarLengthPts  = input.int(10, "MinPinbarLength(Points)", minval=0)
qty                 = input.float(1.0, "Order Qty", minval=0.0, step=0.1)
minVolume           = input.float(500, "Min Volume to Trade", minval=0)

// ===== 识别上一根K线 Pinbar =====
o1 = open[1]
h1 = high[1]
l1 = low[1]
c1 = close[1]

totalLen  = h1 - l1
bodySize  = math.abs(c1 - o1)
isBearish = o1 > c1
upperShadow = isBearish ? (h1 - o1) : (h1 - c1)
lowerShadow = isBearish ? (c1 - l1) : (o1 - l1)

// 最小长度：点数 * 最小跳动
minLen = minPinbarLengthPts * syminfo.mintick

validLen      = totalLen > 0 and totalLen >= minLen
bodyOk        = validLen and (bodySize / totalLen) <= pinbarBodyRatio
shadowOk      = validLen and (math.max(upperShadow, lowerShadow) / totalLen) >= pinbarShadowRatio

isBullPinbar1 = shadowOk and bodyOk and (lowerShadow > upperShadow)
isBearPinbar1 = shadowOk and bodyOk and (upperShadow > lowerShadow)
isPinbar1     = validLen and bodyOk and shadowOk and (lowerShadow != upperShadow)

// ===== 标注（偏移到上一根K线位置） =====
plotshape(isBullPinbar1, title="Bull Pinbar", style=shape.triangleup, color=color.new(color.lime, 0), size=size.tiny, location=location.belowbar, offset=1, text="BP")
plotshape(isBearPinbar1, title="Bear Pinbar", style=shape.triangledown, color=color.new(color.red, 0), size=size.tiny, location=location.abovebar, offset=1, text="SP")

// ===== 只在新出现的上一根 Pinbar 时触发一次（兼容历史与实时） =====
var int lastPinbarTime = na
newSignal = isPinbar1 and (na(lastPinbarTime) or lastPinbarTime != time[1])
volOk     = volume > minVolume

longSignal  = newSignal and isBullPinbar1 and volOk
shortSignal = newSignal and isBearPinbar1 and volOk

// ===== 1:1 RR 止损/止盈 =====
// 入场使用当前K线的开盘/市价（由策略托管），SL 基于上一根 Pinbar 极点，TP 与入场到 SL 的距离相等
if longSignal
    // 多：SL = pinbar低点
    longSL = l1
    // 预估入场价：用当前bar开盘价（更接近实际回测表现）
    entryPriceLong = open
    riskLong = math.max(entryPriceLong - longSL, syminfo.mintick)
    longTP = entryPriceLong + riskLong
    strategy.entry("Long", strategy.long, qty=qty)
    strategy.exit("Long-Exit", "Long", stop=longSL, limit=longTP)
    lastPinbarTime := time[1]

if shortSignal
    // 空：SL = pinbar高点
    shortSL = h1
    entryPriceShort = open
    riskShort = math.max(shortSL - entryPriceShort, syminfo.mintick)
    shortTP = entryPriceShort - riskShort
    strategy.entry("Short", strategy.short, qty=qty)
    strategy.exit("Short-Exit", "Short", stop=shortSL, limit=shortTP)
    lastPinbarTime := time[1]