PineScript策略开发遇'end of line without line continuation'报错求助

我不是PineScript资深开发者，目前在做策略开发，但始终遇到报错end of line without line continuation。试过用4空格或制表符格式化代码，也找过相关平台和ChatGPT，都没能解决，报错一直出现。希望能在这里分享代码，有人帮忙排查问题，以下是我写的代码：

BP = iff(close < open, 
        iff(close[1] < open, math.max(high - close[1], close - low), 
            math.max(high - open, close - low)),
        iff(close > open,     
        iff(close[1] > open, high - low, 
            math.max(open - close[1], high - low)),
        iff(high - close > close - low, 
        iff(close[1] < open, math.max(high - close[1], close - low), high - open),
        iff(high - close < close - low, 
        iff(close[1] > open, high - low,
            math.max(open - close[1], high - low)),
        iff(close[1] > open, math.max(high - open, close - low),
        iff(close[1] < open, math.max(open - close[1], high - low),
            high - low)))))))

内容的提问来源于stack exchange，提问作者user25532658