自编多空仓位Indicator频繁消失，求解决方法

我编写的多空仓位指标功能正常，但会频繁消失，需执行「隐藏-重新显示」操作才能恢复。尝试过修改If语句、使用varip均未解决，代码如下：

//@version=5
indicator("Long & Short Position", "L & S",overlay=true,precision = 4)

Price = input.price(defval = 0,confirm = true, title = "Entry Price")
sl    = input.price(defval = 0,confirm = true, title = "Stop Loss") 
LotSize    = input.defval = 1000.000000, title = "Lot Size") 
rr = input.float(title="Risk Reward Ratio", defval=1.5, minval = 1.00, step=0.10)
Close = close

//Take Profit Calculation
take_profit = (Price - sl)  * rr + Price // Take Profit Value @ 1.5 Risk Reward Ratio 
Buy  = take_profit > Price

//Pips Calculation for Realized Profit
pips = if Buy //take_profit > Price
    (take_profit - Price)  
else
    (Price - take_profit)

PL = (pips * LotSize) 

//Pips Calculations Unrealized Profit
Pips = if Buy // Price > close
    (close - Price)
else 
    (Price - close)

Un_PL = (Pips * LotSize) 

Un_PL_Col = if Un_PL > 0
    color.green
else
    color.red

//Drawing Profit Value on chart
tblPos = "Top Right" 
tblposition = tblPos == 'Top Left' ? position.top_left : tblPos == 'Top Right' ?                 position.top_right : tblPos == 'Bottom Left' ? position.bottom_left : tblPos == 'Bottom Right' ? position.bottom_right : tblPos == 'Middle Left' ? position.middle_left : position.middle_right

tblBorderColor = color.black 
celllBgColor = color.white 
cellTextColor = color.black 

var resultsTable = table.new(position=tblposition, columns=3, rows=3, bgcolor=#ffffff,     border_width=1, frame_color=tblBorderColor, frame_width=4)
table.clear(resultsTable, 0, 0)
table.cell(resultsTable, column=0, row=1, text='Potential P&L : ' + str.tostring(PL,"$ ###.##"), text_color=cellTextColor, text_halign=text.align_right, text_valign=text.align_center, bgcolor=celllBgColor)
table.cell(resultsTable, column=0, row=2, text='Unrealized P&L : ' + str.tostring(Un_PL,"$ ###.##"), text_color=Un_PL_Col, text_halign=text.align_right, text_valign=text.align_center, bgcolor=celllBgColor)

// Plot box on chart
a = box.new(bar_index[1]+ 6, ta.highest(sl, 1), bar_index[1]+ 12, ta.lowest(Price, 1), color.white, 1, line.style_solid, extend.none, xloc.bar_index, color.new(color.red, 60))
b = box.new(bar_index[1]+ 6, ta.highest(Price, 1), bar_index[1]+ 12, ta.lowest(take_profit, 1), color.white, 1, line.style_solid, extend.none, xloc.bar_index, color.new(color.lime, 60))
c = box.new(bar_index[2]+ 9, ta.highest(Price, 2), bar_index[1]+ 10, ta.lowest(Close, 1), color.white, 1, line.style_solid, extend.none, xloc.bar_index, Un_PL_Col)

box.delete(a[1])
box.delete(b[1])      
box.delete(c[1])      

问题根源 #

1. 输入默认值异常：Entry Price和Stop Loss默认值为0，未设置有效值时会导致take_profit计算错误，使box坐标无效，触发指标消失。
2. Box绘制逻辑缺陷：固定bar_index偏移（如bar_index[1]+6）在图表缩放、切换时间框架时，会让box超出可视范围，看似消失。
3. 多空逻辑不完整：原take_profit计算仅适用于多头，空头场景下计算错误，引发绘图异常。

修复后的代码 #

//@version=5
indicator("Long & Short Position", "L & S", overlay=true, precision = 4)

Price = input.price(defval = na, confirm = true, title = "Entry Price")
sl    = input.price(defval = na, confirm = true, title = "Stop Loss") 
LotSize    = input.float(defval = 1000.0, title = "Lot Size") 
rr = input.float(title="Risk Reward Ratio", defval=1.5, minval = 1.00, step=0.10)

// 输入有效性检查：仅当Entry Price和Stop Loss都设置且不相等时执行后续逻辑
valid_input = not na(Price) and not na(sl) and Price != sl

// 区分多空计算止盈价格
is_long = Price > sl
take_profit = na
if valid_input
    take_profit = is_long ? Price + (Price - sl) * rr : Price - (sl - Price) * rr

// 潜在盈亏计算
pips = 0.0
PL = 0.0
if valid_input
    pips = math.abs(take_profit - Price)
    PL = pips * LotSize 

// 浮动盈亏计算
Un_PL = 0.0
Un_PL_Col = color.gray
if valid_input
    unrealized_pips = is_long ? close - Price : Price - close
    Un_PL = unrealized_pips * LotSize 
    Un_PL_Col = Un_PL > 0 ? color.green : color.red

// 表格位置配置
tblPos = input.string("Top Right", title="Table Position", options=["Top Left", "Top Right", "Bottom Left", "Bottom Right", "Middle Left", "Middle Right"])
tblposition = switch tblPos
    "Top Left" => position.top_left
    "Top Right" => position.top_right
    "Bottom Left" => position.bottom_left
    "Bottom Right" => position.bottom_right
    "Middle Left" => position.middle_left
    => position.middle_right

tblBorderColor = color.black 
celllBgColor = color.white 
cellTextColor = color.black 

var resultsTable = table.new(position=tblposition, columns=3, rows=3, bgcolor=#ffffff, border_width=1, frame_color=tblBorderColor, frame_width=4)

// 更新表格内容
if valid_input
    table.clear(resultsTable, 0, 0)
    table.cell(resultsTable, column=0, row=1, text='Potential P&L : ' + str.tostring(PL,"$ ###.##"), text_color=cellTextColor, text_halign=text.align_right, text_valign=text.align_center, bgcolor=celllBgColor)
    table.cell(resultsTable, column=0, row=2, text='Unrealized P&L : ' + str.tostring(Un_PL,"$ ###.##"), text_color=Un_PL_Col, text_halign=text.align_right, text_valign=text.align_center, bgcolor=celllBgColor)
else
    table.clear(resultsTable, 0, 0)
    table.cell(resultsTable, column=0, row=1, text='请设置Entry Price和Stop Loss', text_color=color.red, text_halign=text.align_center, bgcolor=celllBgColor)

// 使用var存储box对象，避免重复创建
var box sl_box = na
var box tp_box = na
var box unrealized_box = na

// 删除旧box
if not na(sl_box) box.delete(sl_box)
if not na(tp_box) box.delete(tp_box)
if not na(unrealized_box) box.delete(unrealized_box)

// 绘制新box（仅输入有效时）
if valid_input
    x_left = bar_index
    x_right = bar_index + 5  // 可自定义宽度
    
    // 止损区间box
    sl_top = math.max(sl, Price)
    sl_bottom = math.min(sl, Price)
    sl_box = box.new(x_left, sl_top, x_right, sl_bottom, color.white, 1, line.style_solid, extend.none, xloc.bar_index, color.new(color.red, 60))
    
    // 止盈区间box
    tp_top = math.max(take_profit, Price)
    tp_bottom = math.min(take_profit, Price)
    tp_box = box.new(x_left + 6, tp_top, x_right + 6, tp_bottom, color.white, 1, line.style_solid, extend.none, xloc.bar_index, color.new(color.lime, 60))
    
    // 浮动盈亏区间box
    unrealized_top = math.max(Price, close)
    unrealized_bottom = math.min(Price, close)
    unrealized_box = box.new(x_left + 3, unrealized_top, x_right + 3, unrealized_bottom, color.white, 1, line.style_solid, extend.none, xloc.bar_index, color.new(Un_PL_Col, 60))

关键修改点 #

• 输入校验：新增valid_input判断，避免无效值引发的计算和绘图异常。
• 多空逻辑修正：分别计算多头/空头的止盈价格，修复原代码仅支持多头的问题。
• Box对象管理：用var存储box实例，每次先删除旧box再创建新box，避免资源泄漏。
• 位置优化：以当前bar为基准设置box位置，避免固定偏移导致的可视范围问题。
• 用户提示：输入无效时显示明确提示，提升体验。

内容的提问来源于stack exchange，提问作者user21637228