PineScript编译错误求助：第9行'TrueRange'语法错误

报错信息 #

9:18:39 AM — Compilation error. Line 9: Syntax error at input 'TrueRange'

原代码 #

indicator("sigbars")
study("Significant Bar gku", shorttitle="Significant Bar", overlay=false) 
length=input(14, "length")
ThreshStrong = input(2, "Strong Significant Bar")
ThreshWeak = input(1.4, "Weak Significant Bar")
TrueRange = at.tr
ATR = atr(length)
strongSB = tr > ATR*ThreshStrong
weakSB = tr > ATR*ThreshWeak
cold1=white
cold2=#b2ebf2
color = strongSB ? cold1 : weakSB ? cold2 : na
band1 = hline(ThreshStrong, "Upper Band", color=#C0C0C0)
band0 = hline(ThreshWeak, "Lower Band", color=#C0C0C0)
fill(band1, band0, color=#9915FF, transp=90, title="Background")
plot(tr, "true range", blue)
plot(ATR, "ATR", black)
plot(tr/ATR,"TR/ATR", red, style = histogram)
//plot(ma,"ma(TR/ATR)", green)
barcolor(color)

plot(close)

问题排查与修复 #

• 重复声明脚本入口：PineScript中脚本只能用indicator()或study()其中一个声明入口，study()是旧版函数，建议统一使用indicator()，删除多余的study()行。
• 错误的真实波幅赋值：at.tr是无效写法，PineScript内置变量tr直接表示当前K线的真实波幅，无需额外定义TrueRange，直接删除TrueRange = at.tr这行即可解决语法错误。
• 可选优化：脚本设置overlay=false（副图显示），最后一行plot(close)会在副图单独绘制收盘价，若不需要可删除该行。

修复后的完整代码 #

indicator("Significant Bar gku", shorttitle="Significant Bar", overlay=false) 
length=input(14, "length")
ThreshStrong = input(2, "Strong Significant Bar")
ThreshWeak = input(1.4, "Weak Significant Bar")
ATR = atr(length)
strongSB = tr > ATR*ThreshStrong
weakSB = tr > ATR*ThreshWeak
cold1=white
cold2=#b2ebf2
color = strongSB ? cold1 : weakSB ? cold2 : na
band1 = hline(ThreshStrong, "Upper Band", color=#C0C0C0)
band0 = hline(ThreshWeak, "Lower Band", color=#C0C0C0)
fill(band1, band0, color=#9915FF, transp=90, title="Background")
plot(tr, "true range", blue)
plot(ATR, "ATR", black)
plot(tr/ATR,"TR/ATR", red, style = histogram)
//plot(ma,"ma(TR/ATR)", green)
barcolor(color)

// 若不需要副图显示收盘价，可删除下面一行
plot(close)

内容的提问来源于stack exchange，提问作者Sam Wich