//@version=6
indicator("多周期 EMA", shorttitle="EMA", overlay=true)

// 参数
src      = input.source(close, "价格源")
showEma26  = input.bool(true,  "显示 EMA26？")
showEma52  = input.bool(true,  "显示 EMA52？")
showEma104 = input.bool(false, "显示 EMA104？")
showEma156 = input.bool(false, "显示 EMA156？")
showEma204 = input.bool(false, "显示 EMA204？")
showDiff   = input.bool(false, "显示 EMA26-EMA52 差值线？")
showCrossMarks = input.bool(false, "标记均线交叉（✕）")
// 主图 EMA
ema26  = ta.ema(src, 26)
ema52  = ta.ema(src, 52)
ema104 = ta.ema(src, 104)
ema156 = ta.ema(src, 156)
ema204 = ta.ema(src, 204)
diff   = ema26 - ema52

plot(ema26,  title="EMA 26",  color=color.new(color.teal,    0), linewidth=2, display=showEma26  ? display.all : display.none)
plot(ema52,  title="EMA 52",  color=color.new(color.orange,  0), linewidth=2, display=showEma52  ? display.all : display.none)
plot(ema104, title="EMA 104", color=color.new(color.blue,    0), linewidth=2, display=showEma104 ? display.all : display.none)
plot(ema156, title="EMA 156", color=color.new(color.fuchsia, 0), linewidth=2, display=showEma156 ? display.all : display.none)
plot(ema204, title="EMA 204", color=color.new(color.green,   0), linewidth=2, display=showEma204 ? display.all : display.none)

// 交叉信号（快线上穿/下穿慢线）
crossUp = ta.crossover(ema26, ema52)
crossDn = ta.crossunder(ema26, ema52)

// 交叉点价格（取两条 EMA 的中点，视觉上就是交叉位置）
crossPrice = (ema26 + ema52) / 2.0

// 用 plotshape 标记交叉点（直接画在两条 EMA 的交叉处）
plotshape(showCrossMarks and crossUp  ? crossPrice : na, title="EMA26 上穿 EMA52", style=shape.xcross, location=location.absolute, color=color.lime, size=size.small, text="", textcolor=color.lime)
plotshape(showCrossMarks and crossDn  ? crossPrice : na, title="EMA26 下穿 EMA52", style=shape.xcross, location=location.absolute, color=color.red,  size=size.small, text="", textcolor=color.red)