Ladder Indicator (优化版)

//version=5
indicator("Ladder Indicator (优化版)", overlay=true)

// 参数
n1 = input.int(26, title="短周期N1")
n2 = input.int(89, title="长周期N2")

// 计算短周期EMA
ema_high_n1 = ta.ema(high, n1)
ema_low_n1 = ta.ema(low, n1)

// 计算长周期EMA
ema_high_n2 = ta.ema(high, n2)
ema_low_n2 = ta.ema(low, n2)

// 定义颜色
color_short = color.blue
color_long = color.yellow

// 短周期条件：收盘在两条线之间
short_band_top = close > ema_high_n1 ? ema_high_n1 : close < ema_low_n1 ? ema_low_n1 : na
short_band_bottom = close > ema_high_n1 ? ema_low_n1 : close < ema_low_n1 ? ema_high_n1 : na

// 长周期条件：收盘在两条线之间
long_band_top = close > ema_high_n2 ? ema_high_n2 : close < ema_low_n2 ? ema_low_n2 : na
long_band_bottom = close > ema_high_n2 ? ema_low_n2 : close < ema_low_n2 ? ema_high_n2 : na

// 绘制短周期梯子（蓝色带）
plot1 = plot(short_band_top, color=color_short, style=plot.style_stepline, linewidth=1)
plot2 = plot(short_band_bottom, color=color_short, style=plot.style_stepline, linewidth=1)
fill(plot1, plot2, color=color_short, transp=70)

// 绘制长周期梯子（黄色带）
plot3 = plot(long_band_top, color=color_long, style=plot.style_stepline, linewidth=1)
plot4 = plot(long_band_bottom, color=color_long, style=plot.style_stepline, linewidth=1)
fill(plot3, plot4, color=color_long, transp=70)

// 绘制K线
plotcandle(open, high, low, close)