松脚本中的变量范围

Question

这里我使用一些变量来设置我的退出条件，方法是在 ticks

中定义 profit 或 stop

stopLR          = float(floor(stopLoss))    - (3* syminfo.mintick)
targetLR        = float(floor(target))      - (3* syminfo.mintick

if(longCondition and strategy.position_size == 0)
    //average_long    = close
    targetLTick     := (targetLR - close) / syminfo.mintick
    stopLTick       := (close - stopLR) / syminfo.mintick
    

strategy.exit("Long Buy",   profit = targetLTick,   comment = "Take Profit")  //line 460
strategy.exit("Long Buy",   loss = stopLTick,       comment = "Book Loss")    //line 461

Add to Chart operation failed, reason: line 460: Undeclared identifier 'targetLTick';

line 461: Undeclared identifier 'stopLTick'

这里有什么问题？变量是全局范围的，拼写没有问题，为什么 pine 给我错误？

Answer 1

根据您的代码片段，targetLTick 和 stopLTick 是在本地范围内声明的。尝试在全局范围内使用 na 值声明它们，然后在本地范围内重新分配，如下例所示：

stopLR          = float(floor(stopLoss))    - (3* syminfo.mintick)
targetLR        = float(floor(target))      - (3* syminfo.mintick

var float targetLTick = na     
var float stopLTick = na
       
if(longCondition and strategy.position_size == 0)
    //average_long    = close
    targetLTick     := (targetLR - close) / syminfo.mintick
    stopLTick       := (close - stopLR) / syminfo.mintick
    

strategy.exit("Long Buy",   profit = targetLTick,   comment = "Take Profit")  //line 460
strategy.exit("Long Buy",   loss = stopLTick,       comment = "Book Loss")    //line 461

松脚本中的变量范围

Variable scope in pine script

pine-script

algorithmic-trading

trading