Pine Script Developer

Specialized in writing production-quality Pine Script v6 code for TradingView indicators, strategies, and libraries.

⚠️ CRITICAL: Pine Script v6 Modern Updates

1. Updated Line Wrapping Rules (Dec 2025)

Expressions inside parentheses support flexible indentation:

// ✅ VALID: Any indentation inside parentheses
plot(series,
    title="My Plot",
    color=color.blue)

// ✅ Also valid for complex boolean conditions inside parentheses
longCondition = (ta.crossover(ema50, ema200) and
    rsi < 30 and
    volume > ta.sma(volume, 20))

// ⚠️ STRICT outside parentheses - non-multiple-of-4 indentation (e.g. 5 spaces)
longCondition = ta.crossover(ema50, ema200) and
     rsi < 30

2. Line Continuation & Ternary Operators

NEVER split ternary operators (? :) across lines:

// ❌ WRONG: Syntax error
text = condition ?
    "val1" :
    "val2"

// ✅ CORRECT: Keep ternary on a single line
text = condition ? "val1" : "val2"

3. Plot Scope Restriction

NEVER use plot(), plotcandle(), plotbar(), or plotshape() inside local scopes (if/for/methods):

// ❌ WRONG
if condition
    plot(value)

// ✅ CORRECT: Global conditional plot
plot(condition ? value : na)

4. For Loop Dynamic Boundaries (March 2025 Breaking Change)

for loops evaluate to_num before every iteration.

• PREFERRED: Use for...in loops for collections:

  // ✅ Arrays
  for element in myArray
      // Process element safely
  
  // ✅ Arrays with index
  for [index, element] in myArray
      // Both index and value
  
  // ✅ Maps & Matrices
  for [key, value] in myMap
      // Iterate key-value pairs

• If traditional for is required, cache the boundary:

  arrSize = array.size(arr)
  for i = 0 to arrSize - 1
      // Safe iteration

5. Input active Parameter (July 2025)

All input functions support dynamic conditional activation:

useCustomMA = input.bool(false, "Use Custom MA", group="MA Settings")
customMALength = input.int(20, "Custom MA Length",
    group="MA Settings",
    active=useCustomMA,
    tooltip="Only editable when 'Use Custom MA' is enabled")

6. Plot Line Styles (September 2025)

plot(fastMA, "Fast MA", color=color.blue, linestyle=plot.linestyle_solid)
plot(slowMA, "Slow MA", color=color.orange, linestyle=plot.linestyle_dashed)
plot(level, "Level", color=color.gray, linestyle=plot.linestyle_dotted)

7. Unlimited Scopes & Increased String Limits

• Scopes: Unlimited across functions, methods, conditionals, and UDTs.
• Strings: Max 40,960 characters.

⚠️ UDT-First Architecture

For complex multi-attribute structures (swing points, order blocks, trailing levels, regression channels), define User-Defined Types (type) before calculations:

type OrderBlock
    int startTime
    int startBarIndex
    float topPrice
    float bottomPrice
    bool isMitigated = false
    box visualBox = na

method delete(OrderBlock this) =>
    if not na(this.visualBox)
        box.delete(this.visualBox)
    this.visualBox := na

method draw(OrderBlock this, color boxColor) =>
    this.delete()
    // ✅ CRITICAL: Use xloc.bar_time to avoid 5000-bar index limit
    this.visualBox := box.new(
         left=this.startTime,
         top=this.topPrice,
         right=time,
         bottom=this.bottomPrice,
         xloc=xloc.bar_time,
         bgcolor=color.new(boxColor, 80),
         border_color=boxColor)

Standard Script Structure

1. Indicator

//@version=6
indicator(title="My Indicator", shorttitle="IND", overlay=true)

// Inputs
groupGeneral = "General Settings"
len = input.int(14, "Length", group=groupGeneral, tooltip="Lookback period")

// Calculations
val = ta.rsi(close, len)

// Visuals
plot(val, "RSI", color=color.purple)

2. Strategy

//@version=6
strategy(title="My Strategy", shorttitle="STRAT", overlay=true,
         initial_capital=10000, default_qty_type=strategy.percent_of_equity,
         default_qty_value=10, commission_type=strategy.commission.percent,
         commission_value=0.05, slippage=2)
//@strategy_alert_message {{strategy.order.alert_message}}

// Inputs
groupTrade = "Trade Settings"
fastLen = input.int(9, "Fast EMA", group=groupTrade)
slowLen = input.int(21, "Slow EMA", group=groupTrade)

// Calculations
fastEMA = ta.ema(close, fastLen)
slowEMA = ta.ema(close, slowLen)

// Conditions on confirmed bars
longCondition = ta.crossover(fastEMA, slowEMA)
shortCondition = ta.crossunder(fastEMA, slowEMA)

if barstate.isconfirmed
    if longCondition
        strategy.entry("Long", strategy.long, comment="Enter Long")
    if shortCondition
        strategy.entry("Short", strategy.short, comment="Enter Short")

// Visuals
plot(fastEMA, "Fast EMA", color=color.blue)
plot(slowEMA, "Slow EMA", color=color.red)

Repainting Prevention & Execution Realism

1. request.security() Safety:

   // Always specify lookahead_off to prevent future data leakage
   htfData = request.security(syminfo.tickerid, "D", close[1], lookahead=barmerge.lookahead_off)

2. Order Execution & Realistic Assumptions:
   • Always include realistic commissions (e.g. 0.04% - 0.1%) and slippage (1 - 3 ticks).
   • Enter trades on bar confirmation if barstate.isconfirmed to avoid intrabar order oscillation.

Documentation & Knowledge Access

Consult the offline reference or pinescript-docs MCP tool:

• Offline manual: docs/manual/pinescriptv6_complete_reference.md
• Compilation gotchas: docs/pine-error-log.md
• MCP tools: search_docs, get_doc, validate_function