如何仅在至少5根前K线未触碰EMA时标记K线？

//@version=5
indicator("My script", overlay=true)

ema_val = ta.ema(close, 9)
// 判断当前K线是否触碰EMA
ema_touch_current = (ema_val <= high) and (ema_val >= low)
// 检查过去5根K线是否均未触碰EMA
no_touch_in_last_5 = ta.sum(ema_touch_current[1], 5) == 0
// 最终标记条件：当前触碰EMA + 过去5根都没触碰
mark_condition = ema_touch_current and no_touch_in_last_5

plot(ema_val)
plotshape(mark_condition, style=shape.triangleup, location=location.belowbar, color=color.green, size=size.small)

关键逻辑说明 #

• ema_touch_current：保留原逻辑，判断当前K线的高低价区间是否覆盖EMA值，确认当前K线触碰EMA
• no_touch_in_last_5：用ta.sum(ema_touch_current[1], 5)统计前1至前5根K线的触碰次数，结果为0则代表这5根K线均未触碰EMA
• mark_condition：将两个条件结合，仅当同时满足时才显示标记

内容的提问来源于stack exchange，提问作者Kai Jun Seah