Pine script 如何在Pine脚本中使用字符串编写变量？

我试着用变量写文本，但我不能

aaaa = 121.150
bbbb = 120.100
target = "TP = " + ( aaaa * 0.9 ) + "\n SL = " + bbbb*1.01
plotshape(data , style=shape.triangledown,location=location.abovebar, color=red, text=target)

我希望输出如下所示：

要将系列（动态）文本放在图表上，您需要使用Pine v4和

label.new（）

。您将只看到最近创建的~50个标签：

//@version=4
study("", "", true)
aaaa = 121.150
bbbb = 120.100
target = "TP = " + tostring(aaaa * 0.9) + "\n SL = " + tostring(bbbb*1.01)
cond = rising(close, 1)[1] and falling(close, 1)
if cond
    label.new(bar_index, high, target, yloc = yloc.abovebar, color = color.red, style = label.style_triangledown)