和条件不起作用-新手问题tradingview pinescript

Question

我有以下代码提供随机交叉。我想添加一个AND条件，以便仅在crossBelow和stochK都在stochD以上时弹出80。并且只有当crossAbove和stochK都在stochD以下时，20才会弹出。
任何帮助，将不胜感激。我确实尝试了各种AND代码，但遇到编译器错误。

//@version=4
study(title="example", overlay=false)

stochK = sma(stoch(close, high, low, 14), 3)
stochD = sma(stochK, 3)

crossBelow = crossunder(stochK, stochD) 
crossAbove = crossover(stochD, stochK) 

plot(series=stochK, color=color.orange)
plot(series=stochD, color=color.teal)

plotshape(series=crossunder(stochK, stochD), style=shape.flag , color=color.red, location=location.abovebar, transp=0)
plotshape(series=crossunder(stochD, stochK), style=shape.flag, color=color.green, location=location.belowbar, transp=0)

Answer 1

使用：

crossBelow = crossunder(stochK, stochD) and min(stochK, stochD) > 80
crossAbove = crossover(stochD, stochK) and max(stochK, stochD) < 20