Gaps indicator (similar to TradingView)

• 08/01/2025 at 4:08 PM #249243
  David1998P

  Parameters/inputs:

  • close gap partially: (boolean, YES or NO)
  • minimal deviation: as volatility multiple
    nATR := vol = AverageTrueRange[periodATR] / Close, threshold = x
  • limit max gap trail length: (boolean)
    • if = 1, then length = y
  • up gaps and down gaps colors

  ---

  A gap is a visible empty space between two candles.
  Mathematically: Close(t−1) ≠ Open(t), where t defines the time when the gapping candle occurs.

  If
  |Close(t−1) - Open(t)| ≥ x * Vol(t−1)
  then the gap is considered significant.

  If that empty space gets partially or fully filled between t and t+n, the gap must be updated to reflect the remaining unfilled space on the chart.

  ---

  Example:

  • Close(t−1) = 5
  • Open(t) = 10
  • Vol(t−1) = 0.1
  • x = 2

  Then:
  |5 - 10| = 5
2 * 0.1 * 5 = 1
  Since 5 ≥ 1 → gap is significant.

  If in t+1 the candle low reaches 8, then the remaining gap is from 5 to 8.
  Same applies if, in t, the gapping candle has low < open. That portion is considered filled and must be removed.

  General rule:
  0 ≤ unfilled space ≤ |Close(t−1) - Open(t)| := gap

  ---

  Here is the Pine Script version

  //@version=6 indicator("Gaps", overlay = true, max_boxes_count = 500) closeGapsPartially = input.bool(false, "Close Gaps Partially", display = display.data_window) boxLimitInput = input.int(15, "Max Number of Gaps", minval = 1, maxval = 500, display = display.data_window) minimalDeviationTooltip = "Specifies the minimal size of detected gaps, as a percentage of the average high-low range for the last 14 bars." minimalDeviationInput = nz(input.float(30.0, "Minimal Deviation (%)", tooltip = minimalDeviationTooltip, minval=1, maxval=100, display = display.data_window) / 100 * ta.sma(high-low, 14)) limitBoxLengthBoolInput = input.bool(false, "Limit Max Gap Trail Length (bars)", inline = "Length Limit", display = display.data_window) limitBoxLengthIntInput = input.int(300, "", inline = "Length Limit", minval = 1, display = display.data_window) groupName = "Border and fill colors" colorUpBorderInput = input.color(color.green, "Up Gaps", inline = "Gap Up", group = groupName, display = display.data_window) colorUpBackgroundInput = input.color(color.new(color.green, 85), "", inline = "Gap Up", group = groupName, display = display.data_window) colorDownBorderInput = input.color(color.red, "Down Gaps", inline = "Gap Down", group = groupName, display = display.data_window) colorDownBackgroundInput = input.color(color.new(color.red, 85), "", inline = "Gap Down", group = groupName, display = display.data_window) type AlertInfo int countOpenGap int countClosedGap method hasOpenedGap(AlertInfo this) => this.countOpenGap > 0 method hasClosedGap(AlertInfo this) => this.countClosedGap > 0 AlertInfo alertInfo = AlertInfo.new(0, 0) type Gap bool isActive bool isBull array<box> boxes method delete(Gap this) => for _box in this.boxes _box.delete() method partialClose(Gap this) => activeBox = this.boxes.last() activeBox.set_extend(extend.none) top = this.isBull ? activeBox.get_top() : low bottom = this.isBull ? high : activeBox.get_bottom() this.boxes.push(box.new( bar_index, top, bar_index, bottom, this.isBull ? colorDownBorderInput : colorUpBorderInput, bgcolor = this.isBull ? colorDownBackgroundInput : colorUpBackgroundInput)) method fullClose(Gap this) => alertInfo.countClosedGap += 1 activeBox = this.boxes.last() activeBox.set_extend(extend.none) this.isActive := false if closeGapsPartially activeBox.delete() method checkForClose(Gap this) => if this.isActive activeBox = this.boxes.last() top = activeBox.get_top() bot = activeBox.get_bottom() isBull = this.isBull activeBox.set_right(bar_index) if (high > bot and isBull) or (low < top and not isBull) if closeGapsPartially this.partialClose() else this.fullClose() bool forceCloseBoxExceededLengthLimit = (limitBoxLengthBoolInput and bar_index - activeBox.get_left() >= limitBoxLengthIntInput) if ((high > top and isBull) or (low < bot and not isBull)) or forceCloseBoxExceededLengthLimit this.fullClose() var allGaps = array.new<Gap>() isGapDown = high < low[1] and low[1] - high >= minimalDeviationInput isGapUp = low > high[1] and low - high[1] >= minimalDeviationInput isGap = isGapDown or isGapUp boxBorderColor = isGapDown ? colorDownBorderInput : colorUpBorderInput boxBgcolor = isGapDown ? colorDownBackgroundInput : colorUpBackgroundInput registerNewGap(bool isGapDown) => alertInfo.countOpenGap += 1 newBox = box.new( bar_index - 1, (isGapDown ? low[1] : low), bar_index, (isGapDown ? high : high[1]), border_color = boxBorderColor, bgcolor = boxBgcolor, extend = extend.right) allGaps.push(Gap.new(true, isGapDown, array.from(newBox))) if allGaps.size() > boxLimitInput allGaps.shift().delete() for gap in allGaps gap.checkForClose() if isGap registerNewGap(isGapDown) if barstate.islastconfirmedhistory and allGaps.size() == 0 noGapText = "No gaps found on the current chart. \nThe cause could be that some exchanges align the open of new bars on the close of the previous one, resulting in charts with no gaps. Alternatively, your Minimal Deviation might be too high." var infoTable = table.new(position.bottom_right, 1, 1) table.cell(infoTable, 0, 0, text = noGapText, text_color = chart.bg_color, bgcolor = chart.fg_color) alertcondition(alertInfo.hasOpenedGap(), "New Gap Appeared", "A new gap has appeared.") alertcondition(alertInfo.hasClosedGap(), "Gap Closed", "A gap was closed.")

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  //@version=6 indicator("Gaps", overlay = true, max_boxes_count = 500)   closeGapsPartially = input.bool(false, "Close Gaps Partially", display = display.data_window) boxLimitInput = input.int(15, "Max Number of Gaps", minval = 1, maxval = 500, display = display.data_window) minimalDeviationTooltip = "Specifies the minimal size of detected gaps, as a percentage of the average high-low range for the last 14 bars." minimalDeviationInput = nz(input.float(30.0, "Minimal Deviation (%)", tooltip = minimalDeviationTooltip, minval=1, maxval=100, display = display.data_window) / 100 * ta.sma(high-low, 14)) limitBoxLengthBoolInput = input.bool(false, "Limit Max Gap Trail Length (bars)", inline = "Length Limit", display = display.data_window) limitBoxLengthIntInput = input.int(300, "", inline = "Length Limit", minval = 1, display = display.data_window)   groupName = "Border and fill colors" colorUpBorderInput = input.color(color.green, "Up Gaps", inline = "Gap Up", group = groupName, display = display.data_window) colorUpBackgroundInput = input.color(color.new(color.green, 85), "", inline = "Gap Up", group = groupName, display = display.data_window) colorDownBorderInput = input.color(color.red, "Down Gaps", inline = "Gap Down", group = groupName, display = display.data_window) colorDownBackgroundInput = input.color(color.new(color.red, 85), "", inline = "Gap Down", group = groupName, display = display.data_window)   type AlertInfo     int countOpenGap     int countClosedGap   method hasOpenedGap(AlertInfo this) =>     this.countOpenGap > 0   method hasClosedGap(AlertInfo this) =>     this.countClosedGap > 0   AlertInfo alertInfo = AlertInfo.new(0, 0)   type Gap     bool isActive     bool isBull     array<box> boxes   method delete(Gap this) =>     for _box in this.boxes         _box.delete()   method partialClose(Gap this) =>     activeBox = this.boxes.last()     activeBox.set_extend(extend.none)       top = this.isBull ? activeBox.get_top() : low     bottom = this.isBull ? high : activeBox.get_bottom()       this.boxes.push(box.new(       bar_index,       top,       bar_index,       bottom,       this.isBull ? colorDownBorderInput : colorUpBorderInput,       bgcolor = this.isBull ? colorDownBackgroundInput : colorUpBackgroundInput))   method fullClose(Gap this) =>     alertInfo.countClosedGap += 1     activeBox = this.boxes.last()     activeBox.set_extend(extend.none)     this.isActive := false     if closeGapsPartially         activeBox.delete()       method checkForClose(Gap this) =>     if this.isActive         activeBox = this.boxes.last()         top = activeBox.get_top()         bot = activeBox.get_bottom()         isBull = this.isBull         activeBox.set_right(bar_index)           if (high > bot and isBull) or (low < top and not isBull)             if closeGapsPartially                 this.partialClose()                             else                 this.fullClose()           bool forceCloseBoxExceededLengthLimit = (limitBoxLengthBoolInput and bar_index - activeBox.get_left() >= limitBoxLengthIntInput)         if ((high > top and isBull) or (low < bot and not isBull)) or forceCloseBoxExceededLengthLimit             this.fullClose()   var allGaps = array.new<Gap>()   isGapDown = high < low[1] and low[1] - high >= minimalDeviationInput isGapUp = low > high[1] and low - high[1] >= minimalDeviationInput isGap = isGapDown or isGapUp boxBorderColor = isGapDown ? colorDownBorderInput : colorUpBorderInput boxBgcolor = isGapDown ? colorDownBackgroundInput : colorUpBackgroundInput   registerNewGap(bool isGapDown) =>     alertInfo.countOpenGap += 1          newBox = box.new(       bar_index - 1,       (isGapDown ? low[1] : low),       bar_index,       (isGapDown ? high : high[1]),       border_color = boxBorderColor,       bgcolor = boxBgcolor,       extend = extend.right)       allGaps.push(Gap.new(true, isGapDown, array.from(newBox)))       if allGaps.size() > boxLimitInput         allGaps.shift().delete()   for gap in allGaps     gap.checkForClose()   if isGap         registerNewGap(isGapDown)   if barstate.islastconfirmedhistory and allGaps.size() == 0     noGapText = "No gaps found on the current chart. \nThe cause could be that some exchanges align the open of new bars on the close of the previous one, resulting in charts with no gaps. Alternatively, your Minimal Deviation might be too high."     var infoTable = table.new(position.bottom_right, 1, 1)     table.cell(infoTable, 0, 0, text = noGapText, text_color = chart.bg_color, bgcolor = chart.fg_color)   alertcondition(alertInfo.hasOpenedGap(), "New Gap Appeared", "A new gap has appeared.") alertcondition(alertInfo.hasClosedGap(), "Gap Closed", "A gap was closed.")

  ---

  Note: The version we want is slightly different — it detects gaps using Close(t−1) instead of High(t−1) which is more accurate.

  

  David1998P

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