Pine Developer

// ✅ NOW VALID - Any indentation inside parenthesesplot(series,    title="My Plot",    // Can use any indentation    color=color.blue)
// ✅ Also validlongCondition = (ta.crossover(ema50, ema200) and    rsi < 30 and    volume > ta.sma(volume, 20))
// ⚠️ STILL REQUIRED outside parentheses - non-multiple-of-4 indentationlongCondition = ta.crossover(ema50, ema200) and     rsi < 30   // Must NOT be multiple of 4 spaces

// ✅ BEST: Use for...in for arrays (safe, clean, preferred)for element in myArray    // Process element directly
// ✅ BEST: Use for...in with index when neededfor [index, element] in myArray    // Have both index and value
// ✅ for...in works with arrays, matrices, and mapsfor [key, value] in myMap    // Iterate key-value pairs

// ⚠️ BREAKING: This creates infinite loop!var arr = array.new<int>()for i = 0 to array.size(arr)  // Re-evaluated each iteration    array.push(arr, i)  // Array grows, loop never ends!
// ✅ FALLBACK: Cache the boundary if using traditional forsize = array.size(arr)for i = 0 to size    array.push(arr, i)

// Only available on 1T (tick) timeframebidPrice = bid  // Highest buyer price (na on other timeframes)askPrice = ask  // Lowest seller price (na on other timeframes)

useCustomMA = input.bool(false, "Use Custom MA")customMALength = input.int(20, "Custom MA Length",    active=useCustomMA,  // Grayed out when useCustomMA is false    tooltip="Only available when 'Use Custom MA' is enabled")

// For continuous futures - returns underlying contract tickercurrentContract = syminfo.current_contract  // Returns na for non-continuous

// International Securities Identification Number (12 chars)isinCode = syminfo.isin  // Empty string if unavailable

plot(series, linestyle=plot.linestyle_solid)   // Defaultplot(series, linestyle=plot.linestyle_dashed)  // Dashed lineplot(series, linestyle=plot.linestyle_dotted)  // Dotted line

// Get time from 5 bars back on the DAILY timeframe (not current chart)dailyTimeBack = time("D", timeframe_bars_back=5)
// Positive = past bars, Negative = future (expected) timestampsfutureTime = time("D", timeframe_bars_back=-1)  // Expected next bar

// In library://@version=6library("MyLib")export const float PI = 3.14159265359export const int MAX_BARS = 500export const string VERSION = "1.0.0"

// New "PercentageLTP" style for percentage box sizingrenkoTicker = ticker.renko(syminfo.tickerid, "PercentageLTP", 1.0)kagiTicker = ticker.kagi(syminfo.tickerid, "PercentageLTP", 0.5)pnfTicker = ticker.pointfigure(syminfo.tickerid, "PercentageLTP", 1.0)

// Modify box x-coordinates after creationbox.set_xloc(myBox, left, right, xloc.bar_index)box.set_xloc(myBox, leftTime, rightTime, xloc.bar_time)

// ✅ Any indentation works inside ()plot(series,    title="Plot",        color=color.blue,  // Different indentation OK    linewidth=2)
indicator("Title",    overlay=true,    max_bars_back=500)

// ✅ CORRECT - Non-multiple-of-4 indentationlongCondition = ta.crossover(ema50, ema200) and     rsi < 30 and     volume > ta.sma(volume, 20)
// ❌ WRONG - Multiple of 4 (or same level)longCondition = ta.crossover(ema50, ema200) and    rsi < 30  // Error: 4 spaces
longCondition = ta.crossover(ema50, ema200) andrsi < 30  // Error: same indentation

// ❌ NEVER split ternary across linestext = condition ?    "value1" :    "value2"  // ERROR!
// ✅ ALWAYS keep on one linetext = condition ? "value1" : "value2"
// ✅ For long ternaries, use intermediate variablestrueText = str.format("Long value {0}", param1)falseText = str.format("Other value {0}", param2)result = condition ? trueText : falseText

// ❌ WRONG - All of these fail:if condition    plot(value)  // ERROR: Cannot use 'plot' in local scope
for i = 0 to 10    plot(close[i])  // ERROR!
myFunc() =>    plot(close)  // ERROR!
// ✅ CORRECT patterns:plot(condition ? value : na)  // Conditional plottingplot(value, color=condition ? color.blue : na)  // Conditional color
// For dynamic drawing in local scopes, use:if condition    line.new(...)   // OK    label.new(...)  // OK    box.new(...)    // OK

// ALWAYS define UDTs early in script (after inputs, before calculations)type Regression    // Time coordinates (for xloc.bar_time - NO lookback limit!)    int startTime    int endTime
    // Bar indices (for Y calculations: y = slope * barIndex + intercept)    int startBarIndex    int endBarIndex
    // Data parameters    float slope    float intercept    float stdDev    float pearsonR
    // State flags    bool isLive = false    bool isOriginal = false
    // Drawing objects (managed internally)    line centerLine = na    line upperLine = na    line lowerLine = na    linefill fill = na

// Delete method - clean up drawing objectsmethod delete(Regression this) =>    if not na(this.centerLine)        line.delete(this.centerLine)    if not na(this.upperLine)        line.delete(this.upperLine)    if not na(this.lowerLine)        line.delete(this.lowerLine)    if not na(this.fill)        linefill.delete(this.fill)    this.centerLine := na    this.upperLine := na    this.lowerLine := na    this.fill := na
// Calculation methodmethod calculateY(Regression this, int barIdx) =>    this.slope * barIdx + this.intercept
// Draw method - use xloc.bar_time for unlimited lookback!method draw(Regression this, color baseColor, int width) =>    this.delete()  // Clean up old drawings first    startY = this.calculateY(this.startBarIndex)    endY = this.calculateY(this.endBarIndex)
    // ✅ CRITICAL: Use xloc.bar_time - NO 5000 bar limit!    this.centerLine := line.new(         this.startTime, startY,         this.endTime, endY,         xloc=xloc.bar_time,  // ← UNLIMITED LOOKBACK         color=baseColor,         width=width)

// ❌ WRONG - Limited to 5000 bars backline.new(bar_index - 100, y1, bar_index, y2, xloc=xloc.bar_index)
// ✅ CORRECT - Unlimited historical lookbackline.new(time[100], y1, time, y2, xloc=xloc.bar_time)
// Store TIME when events occur, not just bar_indexvar int eventTime = navar int eventBarIndex = naif eventOccurred    eventTime := time           // For drawing    eventBarIndex := bar_index  // For Y calculation

// Single array of UDTs instead of parallel arraysvar array<Regression> regressions = array.new<Regression>()var Regression liveRegression = navar Regression originalRegression = na
// ❌ WRONG - Parallel arrays (hard to maintain)var array<float> slopes = array.new<float>()var array<float> intercepts = array.new<float>()var array<int> startBars = array.new<int>()var array<int> endBars = array.new<int>()// ... 6+ arrays to keep in sync!
// ✅ CORRECT - Single UDT arrayvar array<Regression> regressions = array.new<Regression>()

// Create new instance with all datanewRegression = Regression.new(    startTime = capturedStartTime,    endTime = capturedEndTime,    startBarIndex = capturedStartBar,    endBarIndex = capturedEndBar,    slope = calculatedSlope,    intercept = calculatedIntercept,    stdDev = calculatedStdDev,    pearsonR = calculatedR)
// Add to collectionarray.push(regressions, newRegression)

// ✅ BEST: Use for...in for UDT arraysfor reg in regressions    baseColor = reg.slope >= 0 ? uptrendColor : downtrendColor    reg.draw(baseColor, lineWidth)
// ✅ With index when neededfor [i, reg] in regressions    if i == array.size(regressions) - 1        // Special handling for last item

// Capture BOTH time and bar_index when events occurvar int startTime = navar int startBarIndex = navar int endTime = navar int endBarIndex = na
if eventStart    startTime := time        // For xloc.bar_time drawing    startBarIndex := bar_index  // For Y calculations
if eventEnd    endTime := time    endBarIndex := bar_index
    // Create UDT with both coordinate systems    newItem = MyType.new(        startTime = startTime,        endTime = endTime,        startBarIndex = startBarIndex,        endBarIndex = endBarIndex    )

// built with PineScript Agents by TradersPost//@version=6indicator(title="", shorttitle="", overlay=true)

// built with PineScript Agents by TradersPost//@version=6strategy(title="", shorttitle="", overlay=true)//@strategy_alert_message {{strategy.order.alert_message}}
// ============================================================================// INPUTS// ============================================================================
// Group 1: Main Settingssetting1 = input.int(14, "Setting", group="Main Settings",    tooltip="Description of what this does")
// Group 2: Visual SettingsshowPlots = input.bool(true, "Show Plots", group="Visual Settings")plotColor = input.color(color.blue, "Plot Color", group="Visual Settings",    active=showPlots)  // Grayed out when showPlots is false
// ============================================================================// CALCULATIONS// ============================================================================
// Cache boundaries for loops (March 2025 breaking change)arraySize = array.size(myArray)for i = 0 to arraySize - 1    // Process...
// ============================================================================// CONDITIONS// ============================================================================
// ============================================================================// PLOTS// ============================================================================
// Use new linestyle parameter (September 2025)plot(ma, "MA", color.blue, linewidth=2, linestyle=plot.linestyle_solid)
// ============================================================================// ALERTS// ============================================================================

// Use barstate.isconfirmed for signalsif barstate.isconfirmed and buyCondition    strategy.entry("Long", strategy.long)
// Proper request.security() usagehtfClose = request.security(syminfo.tickerid, "D", close,    lookahead=barmerge.lookahead_off)

// Cache repeated calculationssma20 = ta.sma(close, 20)sma50 = ta.sma(close, 50)crossUp = ta.crossover(sma20, sma50)
// Combine security() calls[htfClose, htfHigh, htfLow] = request.security(syminfo.tickerid, "D",    [close, high, low])

// Input groups with active parameteradvancedMode = input.bool(false, "Advanced Mode", group="Settings")advSetting = input.int(10, "Advanced Setting",    group="Settings",    active=advancedMode,  // July 2025 feature    tooltip="Only visible in advanced mode")

// Check for na valuessafeValue = na(value) ? 0 : value
// Handle division by zerosafeDiv = denominator != 0 ? numerator / denominator : 0
// Cache loop boundaries (March 2025 breaking change)arrSize = array.size(arr)for i = 0 to arrSize - 1    // ...