//@version=6
indicator("EMA26-EMA52 差值线", shorttitle="EMA26_52_DIFF", overlay=false, max_labels_count=500)

// 参数
src     = input.source(close, "价格源")
lenFast = input.int(26, "快线 EMA 长度", minval=1)
lenSlow = input.int(52, "慢线 EMA 长度", minval=1)
showCrossMarks = input.bool(true, "标记均线交叉（✕）")

// 计算 EMA 与差值
emaFast = ta.ema(src, lenFast)
emaSlow = ta.ema(src, lenSlow)
diff    = emaFast - emaSlow

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

// 在差值线上标记交叉点（在本窗格显示）
if showCrossMarks and crossUp
    label.new(bar_index, diff, "✕", xloc=xloc.bar_index, yloc=yloc.price, style=label.style_label_center, color=color.new(color.black, 100), textcolor=color.lime, size=size.small)
if showCrossMarks and crossDn
    label.new(bar_index, diff, "✕", xloc=xloc.bar_index, yloc=yloc.price, style=label.style_label_center, color=color.new(color.black, 100), textcolor=color.red, size=size.small)

// 零轴
plot(
     0,
     title  = "零轴",
     color  = color.new(color.gray, 70),
     linewidth = 1
)

// 差值线（类似 MACD 的 DIF 线）
plot(
     diff,
     title     = "EMA26 - EMA52 差值",
     color     = diff >= 0 ? color.new(color.teal, 0) : color.new(color.red, 0),
     linewidth = 2
)