chart_patterns.pinescript

// This Pine Script™ code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © ActiveQuants
// Created by ActiveQuants
// Last updated: May 8, 2025

//@version=6
indicator(title = "Chart Patterns [ActiveQuants]", overlay = true, max_bars_back = 500, max_lines_count = 500, max_labels_count = 500)

//#region ------ USER INPUTS
// Visibility and Common Styling
int showLast = input.int(defval = 3000, title = "Show Last History (Bars)", minval = 10, step = 10, tooltip = "Number of bars back the indicator can plot.", group = "visibility and common styling", confirm = true)
string patternsVisibility = input.string(defval = "All", title = "Patterns", options = ["All", "Active", "Confirmed", "Invalid"], group = "visibility and common styling")
int patternLineWidth = input.int(defval = 1, title = "Pattern Line Width", minval = 1, maxval = 10, group = "visibility and common styling")
color bearishColor = input.color(defval = color.red, title = "Bearish Color", group = "visibility and common styling")
color bullishColor = input.color(defval = color.green, title = "Bullish Color", group = "visibility and common styling")

// Pivot Points
int period = input.int(defval = 10, title = "Period", minval = 2, group = "pivot points")
bool showPivotHighs = input.bool(defval = true, title = "Show Pivot Highs", group = "pivot points")
bool showPivotLows = input.bool(defval = true, title = "Show Pivot Lows", group = "pivot points")
color pivotHighColor = input.color(defval = #ff5252, title = "Pivot Highs Color", inline = "pivots color", group = "pivot points")
color pivotLowColor = input.color(defval = #089981, title = "Pivot Lows Color", inline = "pivots color", group = "pivot points")

// Patterns
bool showLowerLow = input.bool(defval = true, title = "Lower Low", group = "patterns")
bool showLowerLowLowerHigh = input.bool(defval = true, title = "Lower Low & Lower High", group = "patterns")
bool showHigherHigh = input.bool(defval = true, title = "Higher High", group = "patterns")
bool showHigherHighHigherLow = input.bool(defval = true, title = "Higher High & Higher Low", group = "patterns")
bool showDoubleTops = input.bool(defval = true, title = "Double Tops", group = "patterns")
bool showDoubleBottoms = input.bool(defval = true, title = "Double Bottoms", group = "patterns")
//#endregion

//#region ------ USER-DEFINED TYPES
type PatternInfo
    string patternType
    string status
    int breakBarIdx

    int p1Idx
    int p2Idx
    int p3Idx
    int p4Idx
    int p5Idx
    int p6Idx
    float p1Price
    float p2Price
    float p3Price
    float p4Price
    float p5Price
    float p6Price

    float supportSlope
    float resistanceSlope

    array<line> connectingLines
    int firstConnectingLineBreakIdx
    int lastConnectingLineBreakIdx
    line supportLine
    line resistanceLine
    int supportLineBreakIdx
    int resistanceLineBreakIdx
    linefill patternFill

    label mainLabel
    label label1
    label label2
    label label3
//#endregion

//#region ----- FUNCTIONS
// @function Gets pivot points and updates global price/index arrays.
// @param period (int) The number of bars back to check.
// @returns "ph", "phx", "pl", "plx", "newPivotDetected"
getPivotPoints(int period, array<float> pivotsPrices, array<int> pivotsBarIndices) =>
    var int lastPivot = 1
    var int phx = na
    var int plx = na

    float upper = ta.highest(period)
    float lower = ta.lowest(period)

    lastPivot := high[period] > upper ? 1 : low[period] < lower ? -1 : lastPivot[1]

    float ph = lastPivot == 1 and lastPivot[1] != 1 ? high[period] : na
    phx := lastPivot == 1 and lastPivot[1] != 1 ? bar_index[period] : phx

    float pl = lastPivot == -1 and lastPivot[1] != -1 ? low[period] : na
    plx := lastPivot == -1 and lastPivot[1] != -1 ? bar_index[period] : plx

    bool newPivotDetected = false

    if not na(ph)
        array.push(pivotsPrices, ph)
        array.push(pivotsBarIndices, phx)
        newPivotDetected := true
    if not na(pl)
        array.push(pivotsPrices, pl)
        array.push(pivotsBarIndices, plx)
        newPivotDetected := true

    [ph, phx, pl, plx, newPivotDetected]

getPivotsSlope(float p1Price, float p2Price, int p1Index, int p2Index) =>
    if na(p1Price) or na(p2Price) or p1Index == p2Index
        na
    else
        (p2Price - p1Price) / (p2Index - p1Index)

method deletePattern(PatternInfo pattern) =>
    if not na(pattern.connectingLines)
        for lineId in pattern.connectingLines
            lineId.delete()
        pattern.connectingLines.clear()
    pattern.supportLine.delete()
    pattern.resistanceLine.delete()
    pattern.mainLabel.delete()
    pattern.label1.delete()
    pattern.label2.delete()
    pattern.label3.delete()

method updatePattern(PatternInfo pattern) =>
    if (pattern.patternType == "Double Top" and close < pattern.p5Price) or (pattern.patternType == "Double Bottom" and close > pattern.p5Price)
        pattern.lastConnectingLineBreakIdx := bar_index
        pattern.status := "Confirmed"
        pattern.mainLabel.set_x(pattern.lastConnectingLineBreakIdx)
        if not na(pattern.connectingLines) and pattern.connectingLines.size() >= 2
            pattern.connectingLines.get(-2).set_x2(pattern.lastConnectingLineBreakIdx)
            pattern.connectingLines.get(-1).set_x2(pattern.lastConnectingLineBreakIdx)

    else if pattern.patternType == "Double Top" or pattern.patternType == "Double Bottom"
        pattern.mainLabel.set_x(bar_index)
        if not na(pattern.connectingLines) and pattern.connectingLines.size() >= 2
            pattern.connectingLines.get(-2).set_x2(bar_index)
            pattern.connectingLines.get(-1).set_x2(bar_index)

lowerLow(float p1, float p2, float p3, float p4, float p5) =>
    p1 < p2 and p1 < p3 and
     p2 > p3 and p2 < p4 and
     p3 < p4 and
     p4 > p5 and
     p5 < p3

lowerLowLowerHigh(float p1, float p2, float p3, float p4, float p5, float p6) =>
    p1 < p2 and p1 < p3 and
     p2 > p3 and p2 < p4 and
     p3 < p4 and
     p4 > p5 and p4 > p6 and
     p5 < p3 and p5 < p6

higherHigh(float p1, float p2, float p3, float p4, float p5) =>
    p1 > p2 and p1 > p3 and
     p2 < p3 and p2 > p4 and
     p3 > p4 and
     p4 < p5 and
     p5 > p3

higherHighHigherLow(float p1, float p2, float p3, float p4, float p5, float p6) =>
    p1 > p2 and p1 > p3 and
     p2 < p3 and p2 > p4 and
     p3 > p4 and
     p4 < p5 and p4 < p6 and
     p5 > p3 and p5 > p6

doubleTop(float p2, float p3, float p4, int p1Idx, int p4Idx, float atr) =>
    close[bar_index - p1Idx] < p3 and p2 > p3 and p4 > p3 and math.abs(p2 - p4) <= atr[bar_index - p4Idx]/6

doubleBottom(float p2, float p3, float p4, int p1Idx, int p4Idx, float atr) =>
    close[bar_index - p1Idx] > p3 and p2 < p3 and p4 < p3 and math.abs(p2 - p4) <= atr[bar_index - p4Idx]/6
//#endregion

//#region ------ CALCULATIONS
var array<float> pivotsPrices = array.new<float>()
var array<int> pivotsBarIndices = array.new<int>()
var array<PatternInfo> activePatterns = array.new<PatternInfo>()

[ph, phx, pl, plx, newPivotDetected] = getPivotPoints(period, pivotsPrices, pivotsBarIndices)
float atr = ta.atr(14)

if array.size(pivotsPrices) >= 6 and newPivotDetected and barstate.isconfirmed
    i1 = array.get(pivotsBarIndices, array.size(pivotsBarIndices) - 6)
    i2 = array.get(pivotsBarIndices, array.size(pivotsBarIndices) - 5)
    i3 = array.get(pivotsBarIndices, array.size(pivotsBarIndices) - 4)
    i4 = array.get(pivotsBarIndices, array.size(pivotsBarIndices) - 3)
    i5 = array.get(pivotsBarIndices, array.size(pivotsBarIndices) - 2)
    i6 = array.get(pivotsBarIndices, array.size(pivotsBarIndices) - 1)

    p1 = array.get(pivotsPrices, array.size(pivotsPrices) - 6)
    p2 = array.get(pivotsPrices, array.size(pivotsPrices) - 5)
    p3 = array.get(pivotsPrices, array.size(pivotsPrices) - 4)
    p4 = array.get(pivotsPrices, array.size(pivotsPrices) - 3)
    p5 = array.get(pivotsPrices, array.size(pivotsPrices) - 2)
    p6 = array.get(pivotsPrices, array.size(pivotsPrices) - 1)

    if lowerLow(p2, p3, p4, p5, p6) and showLowerLow
        PatternInfo newPattern = PatternInfo.new(
             patternType = "LL",
             status = "Confirmed",
             p1Idx = i1, p1Price = p1,
             p2Idx = i2, p2Price = p2,
             p3Idx = i3, p3Price = p3,
             p4Idx = i4, p4Price = p4,
             p5Idx = i5, p5Price = p5,
             p6Idx = i6, p6Price = p6,
             connectingLines = array.new_line(),
             mainLabel = label.new(i6, close, "LL", yloc = yloc.belowbar, color = bearishColor, style = label.style_label_up, size = size.small, tooltip = "Lower Low")

         )
        newPattern.connectingLines.push(line.new(newPattern.p2Idx, newPattern.p2Price, newPattern.p3Idx, newPattern.p3Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p3Idx, newPattern.p3Price, newPattern.p4Idx, newPattern.p4Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p4Idx, newPattern.p4Price, newPattern.p5Idx, newPattern.p5Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p5Idx, newPattern.p5Price, newPattern.p6Idx, newPattern.p6Price, color = bearishColor, width = patternLineWidth))
        activePatterns.push(newPattern)
    
    if lowerLowLowerHigh(p1, p2, p3, p4, p5, p6) and showLowerLowLowerHigh
        PatternInfo newPattern = PatternInfo.new(
             patternType = "LL & LH",
             status = "Confirmed",
             p1Idx = i1, p1Price = p1,
             p2Idx = i2, p2Price = p2,
             p3Idx = i3, p3Price = p3,
             p4Idx = i4, p4Price = p4,
             p5Idx = i5, p5Price = p5,
             p6Idx = i6, p6Price = p6,
             connectingLines = array.new_line(),
             mainLabel = label.new(i6, close, "LL & LH", yloc = yloc.abovebar, color = bearishColor, style = label.style_label_down, size = size.small, tooltip = "Lower Low & Lower High")

         )
        newPattern.connectingLines.push(line.new(newPattern.p1Idx, newPattern.p1Price, newPattern.p2Idx, newPattern.p2Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p2Idx, newPattern.p2Price, newPattern.p3Idx, newPattern.p3Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p3Idx, newPattern.p3Price, newPattern.p4Idx, newPattern.p4Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p4Idx, newPattern.p4Price, newPattern.p5Idx, newPattern.p5Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p5Idx, newPattern.p5Price, newPattern.p6Idx, newPattern.p6Price, color = bearishColor, width = patternLineWidth))
        activePatterns.push(newPattern)

    if higherHigh(p2, p3, p4, p5, p6) and showHigherHigh
        PatternInfo newPattern = PatternInfo.new(
             patternType = "HH",
             status = "Confirmed",
             p1Idx = i1, p1Price = p1,
             p2Idx = i2, p2Price = p2,
             p3Idx = i3, p3Price = p3,
             p4Idx = i4, p4Price = p4,
             p5Idx = i5, p5Price = p5,
             p6Idx = i6, p6Price = p6,
             connectingLines = array.new_line(),
             mainLabel = label.new(i6, close, "HH", yloc = yloc.abovebar, color = bullishColor, style = label.style_label_down, size = size.small, tooltip = "Higher High")

         )
        newPattern.connectingLines.push(line.new(newPattern.p2Idx, newPattern.p2Price, newPattern.p3Idx, newPattern.p3Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p3Idx, newPattern.p3Price, newPattern.p4Idx, newPattern.p4Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p4Idx, newPattern.p4Price, newPattern.p5Idx, newPattern.p5Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p5Idx, newPattern.p5Price, newPattern.p6Idx, newPattern.p6Price, color = bullishColor, width = patternLineWidth))
        activePatterns.push(newPattern)

    if higherHighHigherLow(p1, p2, p3, p4, p5, p6) and showHigherHighHigherLow
        PatternInfo newPattern = PatternInfo.new(
             patternType = "HH & HL",
             status = "Confirmed",
             p1Idx = i1, p1Price = p1,
             p2Idx = i2, p2Price = p2,
             p3Idx = i3, p3Price = p3,
             p4Idx = i4, p4Price = p4,
             p5Idx = i5, p5Price = p5,
             p6Idx = i6, p6Price = p6,
             connectingLines = array.new_line(),
             mainLabel = label.new(i6, close, "HH & HL", yloc = yloc.belowbar, color = bullishColor, style = label.style_label_up, size = size.small, tooltip = "Higher High & Higher Low")

         )
        newPattern.connectingLines.push(line.new(newPattern.p1Idx, newPattern.p1Price, newPattern.p2Idx, newPattern.p2Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p2Idx, newPattern.p2Price, newPattern.p3Idx, newPattern.p3Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p3Idx, newPattern.p3Price, newPattern.p4Idx, newPattern.p4Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p4Idx, newPattern.p4Price, newPattern.p5Idx, newPattern.p5Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p5Idx, newPattern.p5Price, newPattern.p6Idx, newPattern.p6Price, color = bullishColor, width = patternLineWidth))
        activePatterns.push(newPattern)

    if doubleTop(p4, p5, p6, i3, i6, atr) and showDoubleTops
        PatternInfo newPattern = PatternInfo.new(
             patternType = "Double Top",
             status = "Active",
             p1Idx = i1, p1Price = p1,
             p2Idx = i2, p2Price = p2,
             p3Idx = i3, p3Price = p3,
             p4Idx = i4, p4Price = p4,
             p5Idx = i5, p5Price = p5,
             p6Idx = i6, p6Price = p6,
             connectingLines = array.new_line(),
             label1 = label.new(i4, close, "Top 1", yloc = yloc.abovebar, color = bearishColor, style = label.style_label_down, size = size.small),
             label2 = label.new(i6, close, "Top 2", yloc = yloc.abovebar, color = bearishColor, style = label.style_label_down, size = size.small)
         )

        for i=newPattern.p3Idx to newPattern.p4Idx
            if getPivotsSlope(newPattern.p3Price, newPattern.p4Price, newPattern.p3Idx, newPattern.p4Idx) * (i - newPattern.p3Idx) + newPattern.p3Price >= newPattern.p5Price
                newPattern.firstConnectingLineBreakIdx := i
                break

        for i=newPattern.p6Idx to bar_index
            int x = bar_index - i
            if close[x] < newPattern.p5Price
                newPattern.lastConnectingLineBreakIdx := i
                newPattern.status := "Confirmed"
                break

        newPattern.mainLabel := label.new(na(newPattern.lastConnectingLineBreakIdx) ? bar_index : newPattern.lastConnectingLineBreakIdx, close, "Double Top", yloc = yloc.abovebar, color = bearishColor, style = label.style_label_down, size = size.small)
        newPattern.connectingLines.push(line.new(newPattern.p3Idx, newPattern.p3Price, newPattern.p4Idx, newPattern.p4Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p4Idx, newPattern.p4Price, newPattern.p5Idx, newPattern.p5Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p5Idx, newPattern.p5Price, newPattern.p6Idx, newPattern.p6Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p6Idx, newPattern.p6Price, na(newPattern.lastConnectingLineBreakIdx) ? bar_index : newPattern.lastConnectingLineBreakIdx, newPattern.p5Price, color = bearishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(na(newPattern.firstConnectingLineBreakIdx) ? bar_index : newPattern.firstConnectingLineBreakIdx, newPattern.p5Price, na(newPattern.lastConnectingLineBreakIdx) ? bar_index : newPattern.lastConnectingLineBreakIdx, newPattern.p5Price, color = bearishColor, style = line.style_dotted, width = patternLineWidth + 1))
        activePatterns.push(newPattern)

    if doubleBottom(p4, p5, p6, i3, i6, atr) and showDoubleBottoms
        PatternInfo newPattern = PatternInfo.new(
             patternType = "Double Bottom",
             status = "Active",
             p1Idx = i1, p1Price = p1,
             p2Idx = i2, p2Price = p2,
             p3Idx = i3, p3Price = p3,
             p4Idx = i4, p4Price = p4,
             p5Idx = i5, p5Price = p5,
             p6Idx = i6, p6Price = p6,
             connectingLines = array.new_line(),
             label1 = label.new(i4, close, "Bottom 1", yloc = yloc.belowbar, color = bullishColor, style = label.style_label_up, size = size.small),
             label2 = label.new(i6, close, "Bottom 2", yloc = yloc.belowbar, color = bullishColor, style = label.style_label_up, size = size.small)
         )

        for i=newPattern.p3Idx to newPattern.p4Idx
            if getPivotsSlope(newPattern.p3Price, newPattern.p4Price, newPattern.p3Idx, newPattern.p4Idx) * (i - newPattern.p3Idx) + newPattern.p3Price <= newPattern.p5Price
                newPattern.firstConnectingLineBreakIdx := i
                break

        for i=newPattern.p6Idx to bar_index
            int x = bar_index - i
            if close[x] > newPattern.p5Price
                newPattern.lastConnectingLineBreakIdx := i
                newPattern.status := "Confirmed"
                break

        newPattern.mainLabel := label.new(na(newPattern.lastConnectingLineBreakIdx) ? bar_index : newPattern.lastConnectingLineBreakIdx, close, "Double Bottom", yloc = yloc.belowbar, color = bullishColor, style = label.style_label_up, size = size.small)
        newPattern.connectingLines.push(line.new(newPattern.p3Idx, newPattern.p3Price, newPattern.p4Idx, newPattern.p4Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p4Idx, newPattern.p4Price, newPattern.p5Idx, newPattern.p5Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p5Idx, newPattern.p5Price, newPattern.p6Idx, newPattern.p6Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(newPattern.p6Idx, newPattern.p6Price, na(newPattern.lastConnectingLineBreakIdx) ? bar_index : newPattern.lastConnectingLineBreakIdx, newPattern.p5Price, color = bullishColor, width = patternLineWidth))
        newPattern.connectingLines.push(line.new(na(newPattern.firstConnectingLineBreakIdx) ? bar_index : newPattern.firstConnectingLineBreakIdx, newPattern.p5Price, na(newPattern.lastConnectingLineBreakIdx) ? bar_index : newPattern.lastConnectingLineBreakIdx, newPattern.p5Price, color = bullishColor, style = line.style_dotted, width = patternLineWidth + 1))
        activePatterns.push(newPattern)
//#endregion

//#region ------ PLOTTING
plot(showPivotHighs ? ph : na, "Swing High", color.new(pivotHighColor, 50), 5, plot.style_circles, offset = -period, show_last = showLast)
plot(showPivotLows ? pl : na, "Swing Low", color.new(pivotLowColor, 50), 5, plot.style_circles, offset = -period, show_last = showLast)

for pattern in activePatterns
    if pattern.status == "Active"
        pattern.updatePattern()

    if newPivotDetected and pattern.p6Idx < bar_index - period and pattern.status == "Active"
        if (low[period] >= pattern.p5Price and pattern.patternType == "Double Top") or (low[period] <= pattern.p5Price and pattern.patternType == "Double Bottom")
            pattern.status := "Invalid"
            pattern.mainLabel.set_x(bar_index - period), pattern.mainLabel.set_text("Invalid " + pattern.mainLabel.get_text()), pattern.mainLabel.set_tooltip("This pivot was created before the " + pattern.patternType + " neckline breakout!")
            if pattern.connectingLines.size() >= 2
                pattern.connectingLines.get(-2).set_x2(bar_index - period)
                pattern.connectingLines.get(-1).set_x2(bar_index - period)

    if pattern.p1Idx < bar_index - showLast
        pattern.deletePattern()

    if barstate.islastconfirmedhistory and 
         ((patternsVisibility == "Active" and pattern.status != "Active") or (patternsVisibility == "Confirmed" and pattern.status != "Confirmed") or (patternsVisibility == "Invalid" and pattern.status != "Invalid"))
        pattern.deletePattern()
//#endregion