-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=31&p=159071#p159071

-- +------------------------------------------------------------------------------------------------+
-- |                                                              Copyright 2025, Gehtsoft USA LLC  | 
-- |                                                                         http://fxcodebase.com  |
-- |                                                               Paypal:  https://goo.gl/9Rj74e   |
-- +------------------------------------------------------------------------------------------------+
-- |                                                                   Developed by : Mario Jemic   |                    
-- |                                                                       mario.jemic@gmail.com    |
-- |                                                                       https://mario-jemic.com/ | 
-- |                                                             Patreon :  http://tiny.cc/1ybwxz   |   
-- |                                                      Buy Me a Coffee:  http://tiny.cc/bj7vxz   |  
-- +-----------------+----------------------+-------------------------------------------------------+
-- |  Cryptocurrency |  Network             |  Address                                              |
-- +-----------------+----------------------+-------------------------------------------------------+
-- |  BTC            |  BTC                 |  16F5k43RXibTmna4np8bPVgmXM1CzjXFJJ                   | 
-- |  SOL            |  SOL                 |  3nh5rpUKopcYLNU4zGCdUFAkM3iRQq8VVUmuzVG6VDf2         | 
-- |  ETH            |  ERC20               |  0xe53aab6bc468a963a02d1319660ee60cf80fc8e7           |
-- |  BNB            |  BEP20               |  0xe53aab6bc468a963a02d1319660ee60cf80fc8e7           | 
-- |  USDT           |  BEP20               |  0xe53aab6bc468a963a02d1319660ee60cf80fc8e7           | 
-- |  XRP            |  BEP20               |  0xe53aab6bc468a963a02d1319660ee60cf80fc8e7           | 
-- +-----------------+----------------------+-------------------------------------------------------+ 
-- Indicator profile initialization routine

local indi_alerts = {}
indi_alerts.Version = "2.2"
indi_alerts.inverted_arrows = false
local a
local b
local source
local Close
local Average
local alerts = {
    {
        Stage = 2,
        UpCondition = function(period)
            if period < a:first() + 1 then
                return false
            end
            return a[period] > a[period - 1] and Close[period] > Average[period];
        end,
        DownCondition = function(period)
            if period < a:first() + 1 then
                return false
            end
            return a[period] < a[period - 1] and Close[period] > Average[period];
        end,
        FormatMessage = function(source, period, level, label, isUp, metadata)
            return string.format(
                "Label: %s\013\010" ..
                    "Instrument: %s\013\010" .. "Time Frame: %s\013\010" .. "Price: %s\013\010" .. "Date: %s",
                isUp and (label .. " Bull pattern") or (label .. " Bear pattern"),
                source:instrument(),
                source:barSize(),
                win32.formatNumber(source:isBar() and source.close[NOW] or source[NOW], false, source:getPrecision()),
                core.formatDate(core.now())
            )
        end,
        FilterConsecutive = false,
        OnChange = true,
        Name = "Upper line cross"
    },
    {
        Stage = 2,
        UpCondition = function(period)
            if period < b:first() + 1 then
                return false
            end
            return b[period] > b[period - 1] and Close[period] < Average[period];
        end,
        DownCondition = function(period)
            if period < b:first() + 1 then
                return false
            end
            return b[period] < b[period - 1] and Close[period] < Average[period];
        end,
        FormatMessage = function(source, period, level, label, isUp, metadata)
            return string.format(
                "Label: %s\013\010" ..
                    "Instrument: %s\013\010" .. "Time Frame: %s\013\010" .. "Price: %s\013\010" .. "Date: %s",
                isUp and (label .. " Bull pattern") or (label .. " Bear pattern"),
                source:instrument(),
                source:barSize(),
                win32.formatNumber(source:isBar() and source.close[NOW] or source[NOW], false, source:getPrecision()),
                core.formatDate(core.now())
            )
        end,
        FilterConsecutive = false,
        OnChange = true,
        Name = "Lower line cross"
    }
}

function Activate(alert, period, historical_period)
    if indi_alerts.Live ~= "Live" then
        period = period - 1
    end
    alert.Alert[period] = 0
    if not alert.ON then
        return
    end
    local isUp, upMetadata = alert.UpCondition(period)
    if isUp then
        if alert.OnChange then
            local isUpPrev, _ = alert.UpCondition(period - 1)
            if isUpPrev then
                return
            end
        end
        if source:isBar() then
            alert:UpAlert(source, period, source.high[period], historical_period, upMetadata)
        else
            alert:UpAlert(source, period, source[period], historical_period, upMetadata)
        end
        return
    end
    local isDown, downMetadata = alert.DownCondition(period)
    if isDown then
        if alert.OnChange then
            local isDownPrev, _ = alert.DownCondition(period - 1)
            if isDownPrev then
                return
            end
        end
        if source:isBar() then
            alert:DownAlert(source, period, source.low[period], historical_period, downMetadata)
        else
            alert:DownAlert(source, period, source[period], historical_period, downMetadata)
        end
    end
end

function AsyncOperationFinished(cookie, success, message, message1, message2)
    indi_alerts:AsyncOperationFinished(cookie, success, message, message1, message2)
end

indi_alerts.last_id = 0
indi_alerts._alerts = {}
indi_alerts._advanced_alert_timer = nil
function indi_alerts:AddParameters(parameters)
    indicator.parameters:addGroup("Alert Mode")
    indicator.parameters:addString("Live", "End of Turn / Live", "", "Live")
    indicator.parameters:addStringAlternative("Live", "End of Turn", "", "End of Turn")
    indicator.parameters:addStringAlternative("Live", "Live", "", "Live")
    indicator.parameters:addBoolean("strategy_output", "Output for strategies", "Used by the strategies", false)

    indicator.parameters:addInteger("ToTime", "Convert the date to", "", 6)
    indicator.parameters:addIntegerAlternative("ToTime", "EST", "", 1)
    indicator.parameters:addIntegerAlternative("ToTime", "UTC", "", 2)
    indicator.parameters:addIntegerAlternative("ToTime", "Local", "", 3)
    indicator.parameters:addIntegerAlternative("ToTime", "Server", "", 4)
    indicator.parameters:addIntegerAlternative("ToTime", "Financial", "", 5)
    indicator.parameters:addIntegerAlternative("ToTime", "Display", "", 6)

    indicator.parameters:addGroup("Alerts")
    indicator.parameters:addBoolean("Show", "Show Dialog box Alert", "", false)
    indicator.parameters:addBoolean("ShowAlert", "Show Alert", "", false)

    indicator.parameters:addGroup("Alerts Sound")
    indicator.parameters:addBoolean("PlaySound", "Play Sound", "", false)
    indicator.parameters:addBoolean("RecurrentSound", "Recurrent Sound", "", false)

    indicator.parameters:addGroup("Alerts Email")
    indicator.parameters:addBoolean("SendEmail", "Send Email", "", false)
    indicator.parameters:addString("Email", "Email", "", "")
    indicator.parameters:setFlag("Email", core.FLAG_EMAIL)

    indicator.parameters:addGroup("External Alerts")
    indicator.parameters:addBoolean(
        "use_advanced_alert",
        "Send Advanced Alert",
        "Telegram/Discord/other platform (like MT4)",
        false
    )
    indicator.parameters:addString(
        "advanced_alert_key",
        "Advanced Alert Key",
        "You can get a key via @profit_robots_bot Telegram Bot. Visit ProfitRobots.com for Discord/other platform keys",
        ""
    )
end

function indi_alerts:AsyncOperationFinished(cookie, success, message, message1, message2)
    if cookie == self._advanced_alert_timer and #self._alerts > 0 then
        if self._advanced_alert_key == nil then
            return
        end
        local data = self:ArrayToJSON(self._alerts)
        self._alerts = {}
        local req = http_lua.createRequest()
        local query =
            string.format(
            '{"Key":"%s","StrategyName":"%s","Platform":"FXTS2","Notifications":%s}',
            self._advanced_alert_key,
            string.gsub(self.StrategyName or "", '"', '\\"'),
            data
        )
        req:setRequestHeader("Content-Type", "application/json")
        req:setRequestHeader("Content-Length", tostring(string.len(query)))
        req:start("http://profitrobots.com/api/v1/notification", "POST", query)
    end
end
function indi_alerts:ToJSON(item)
    local json = {}
    function json:AddStr(name, value)
        local separator = ""
        if self.str ~= nil then
            separator = ","
        else
            self.str = ""
        end
        self.str = self.str .. string.format('%s"%s":"%s"', separator, tostring(name), tostring(value))
    end
    function json:AddNumber(name, value)
        local separator = ""
        if self.str ~= nil then
            separator = ","
        else
            self.str = ""
        end
        self.str = self.str .. string.format('%s"%s":%f', separator, tostring(name), value or 0)
    end
    function json:AddBool(name, value)
        local separator = ""
        if self.str ~= nil then
            separator = ","
        else
            self.str = ""
        end
        self.str = self.str .. string.format('%s"%s":%s', separator, tostring(name), value and "true" or "false")
    end
    function json:ToString()
        return "{" .. (self.str or "") .. "}"
    end
    local first = true
    for idx, t in pairs(item) do
        local stype = type(t)
        if stype == "number" then
            json:AddNumber(idx, t)
        elseif stype == "string" then
            json:AddStr(idx, t)
        elseif stype == "boolean" then
            json:AddBool(idx, t)
        elseif stype == "function" or stype == "table" then
        else
            core.host:trace(tostring(idx) .. " " .. tostring(stype))
        end
    end
    return json:ToString()
end
function indi_alerts:ArrayToJSON(arr)
    local str = "["
    for i, t in ipairs(self._alerts) do
        local json = self:ToJSON(t)
        if str == "[" then
            str = str .. json
        else
            str = str .. "," .. json
        end
    end
    return str .. "]"
end
function indi_alerts:AddAlert(label)
    self.last_id = self.last_id + 1
    indicator.parameters:addGroup(label .. " Alert")

    indicator.parameters:addBoolean("ON" .. self.last_id, "Show " .. label .. " Alert", "", true)

    indicator.parameters:addString("drawing_mode" .. self.last_id, "Drawing mode", "", "arrows")
    indicator.parameters:addStringAlternative("drawing_mode" .. self.last_id, "Arrows", "", "arrows")
    indicator.parameters:addStringAlternative("drawing_mode" .. self.last_id, "Vertical lines", "", "vlines")

    indicator.parameters:addFile("Up" .. self.last_id, label .. " Cross Over Sound", "", "")
    indicator.parameters:setFlag("Up" .. self.last_id, core.FLAG_SOUND)
    indicator.parameters:addInteger("UpSymbol" .. self.last_id, "Up Symbol", "", 217)
    indicator.parameters:addColor("UpColor" .. self.last_id, "Up Color", "", core.rgb(0, 255, 0))

    indicator.parameters:addFile("Down" .. self.last_id, label .. " Cross Under Sound", "", "")
    indicator.parameters:setFlag("Down" .. self.last_id, core.FLAG_SOUND)
    indicator.parameters:addInteger("DownSymbol" .. self.last_id, "Down Symbol", "", 218)
    indicator.parameters:addColor("DownColor" .. self.last_id, "Down Color", "", core.rgb(255, 0, 0))

    indicator.parameters:addString("Label" .. self.last_id, "Label", "", label)
end

function indi_alerts:AddSingleAlert(Label)
    self.last_id = self.last_id + 1
    indicator.parameters:addGroup(Label .. " Alert")

    indicator.parameters:addBoolean("ON" .. self.last_id, "Show " .. Label .. " Alert", "", true)

    indicator.parameters:addFile("Up" .. self.last_id, Label .. " Sound", "", "")
    indicator.parameters:setFlag("Up" .. self.last_id, core.FLAG_SOUND)
    indicator.parameters:addInteger("UpSymbol" .. self.last_id, "Symbol", "", 217)
    indicator.parameters:addColor("UpColor" .. self.last_id, "Color", "", core.rgb(0, 255, 0))

    indicator.parameters:addString("Label" .. self.last_id, "Label", "", Label)
end

function indi_alerts:DrawAlert(context, alert, period)
    if not alert.Alert:hasData(period) then
        return
    end

    if alert.Alert[period] == 1 then
        local x = context:positionOfBar(period)
        if alert.DrawingMode == "arrows" then
            visible, y = context:pointOfPrice(alert.AlertLevel[period])
            width, height = context:measureText(self._stages[alert.Stage].FONT_ID, alert.UpSymbol, 0)
            local x1 = x - width / 2
            local x2 = x + width / 2
            local y1, y2
            if self.inverted_arrows then
                y1 = y
                y2 = y + height
            else
                y1 = y - height
                y2 = y
            end
            context:drawText(self._stages[alert.Stage].FONT_ID, alert.UpSymbol, alert.UpColor, -1, x1, y1, x2, y2, 0)
        else
            context:drawLine(alert.UpLinePen, x, context:top(), x, context:bottom())
        end
    elseif alert.Alert[period] == -1 then
        local x = context:positionOfBar(period)
        if alert.DrawingMode == "arrows" then
            visible, y = context:pointOfPrice(alert.AlertLevel[period])
            width, height = context:measureText(self._stages[alert.Stage].FONT_ID, alert.DownSymbol, 0)
            local x1 = x - width / 2
            local x2 = x + width / 2
            local y1, y2
            if self.inverted_arrows then
                y1 = y - height
                y2 = y
            else
                y1 = y
                y2 = y + height
            end
            context:drawText(
                self._stages[alert.Stage].FONT_ID,
                alert.DownSymbol,
                alert.DownColor,
                -1,
                x1,
                y1,
                x2,
                y2,
                0
            )
        else
            context:drawLine(alert.DownLinePen, x, context:top(), x, context:bottom())
        end
    end
end
indi_alerts.NextId = 1
indi_alerts._stages = {}
function indi_alerts:Draw(stage, context)
    if self._stages[stage] == nil then
        self._stages[stage] = {}
        self._stages[stage].createFont = false
        for _, level in ipairs(self.Alerts) do
            if level.Stage == stage then
                if level.DrawingMode == "vlines" then
                    level.UpLinePen = self.NextId
                    self.NextId = self.NextId + 1
                    level.DownLinePen = self.NextId
                    self.NextId = self.NextId + 1
                    context:createPen(level.UpLinePen, context.SOLID, 1, level.UpColor)
                    context:createPen(level.DownLinePen, context.SOLID, 1, level.DownColor)
                else
                    self._stages[stage].createFont = true
                end
            end
        end
        if self._stages[stage].createFont and self._stages[stage].FONT_ID == nil then
            self._stages[stage].FONT_ID = self.NextId
            self.NextId = self.NextId + 1
            context:createFont(
                self._stages[stage].FONT_ID,
                "Wingdings",
                context:pointsToPixels(self.Size),
                context:pointsToPixels(self.Size),
                0
            )
        end
    end
    for period = math.max(context:firstBar(), self.source:first()), math.min(context:lastBar(), self.source:size() - 1), 1 do
        for _, level in ipairs(self.Alerts) do
            if level.Stage == stage then
                self:DrawAlert(context, level, period)
            end
        end
    end
end
indi_alerts.Alerts = {}
function indi_alerts:GetTimezone()
    local tz = instance.parameters.ToTime
    if tz == 1 then
        return core.TZ_EST
    elseif tz == 2 then
        return core.TZ_UTC
    elseif tz == 3 then
        return core.TZ_LOCAL
    elseif tz == 4 then
        return core.TZ_SERVER
    elseif tz == 5 then
        return core.TZ_FINANCIAL
    elseif tz == 6 then
        return core.TZ_TS
    end
end
function indi_alerts:Prepare()
    self.Show = instance.parameters.Show
    self.Live = instance.parameters.Live
    self.ShowAlert = instance.parameters.ShowAlert
    self.ToTime = self:GetTimezone()

    self.Size = instance.parameters.Size
    self.SendEmail = instance.parameters.SendEmail

    self.PlaySound = instance.parameters.PlaySound
    for i = 1, 100 do
        local on = instance.parameters:getBoolean("ON" .. i)
        if on == nil then
            break
        end
        local alert = {}
        alert.id = i
        alert.UpCondition = alerts[i].UpCondition
        alert.FormatMessage = alerts[i].FormatMessage
        alert.DownCondition = alerts[i].DownCondition
        alert.OnChange = alerts[i].OnChange
        alert.Stage = alerts[i].Stage
        alert.FilterConsecutive = alerts[i].FilterConsecutive
        alert.Label = instance.parameters:getString("Label" .. i)
        alert.ON = on
        alert.DrawingMode = instance.parameters:getString("drawing_mode" .. i)
        alert.UpSymbol = string.char(instance.parameters:getInteger("UpSymbol" .. i))
        local down_symbol = instance.parameters:getInteger("DownSymbol" .. i)
        if down_symbol ~= nil then
            alert.DownSymbol = string.char(down_symbol)
        end
        alert.UpColor = instance.parameters:getColor("UpColor" .. i)
        alert.DownColor = instance.parameters:getColor("DownColor" .. i)
        alert.Up = self.PlaySound and instance.parameters:getString("Up" .. i) or nil
        alert.Down = self.PlaySound and instance.parameters:getString("Down" .. i) or nil
        if alert.DownSymbol == nil then
            alert.DownSymbol = alert.UpSymbol
            alert.DownColor = alert.UpColor
            alert.Down = alert.Up
        end
        assert(
            not (self.PlaySound) or (self.PlaySound and alert.Up ~= "") or (self.PlaySound and alert.Up ~= ""),
            "Sound file must be chosen"
        )
        assert(
            not (self.PlaySound) or (self.PlaySound and alert.Down ~= "") or (self.PlaySound and alert.Down ~= ""),
            "Sound file must be chosen"
        )
        alert.U = nil
        alert.D = nil
        if instance.parameters.strategy_output then
            alert.Alert =
                instance:addStream(
                "strat_signal_" .. i,
                core.Dot,
                "strat_signal_" .. i,
                "Strategy signal #" .. i,
                core.rgb(0, 0, 0),
                0,
                0
            )
        else
            alert.Alert = instance:addInternalStream(0, 0)
        end
        alert.AlertLevel = instance:addInternalStream(0, 0)
        function alert:Clear(period)
            local bookmark = self.Alert:getBookmark(i)
            if bookmark ~= period then
                return
            end
            local i = 1
            while (bookmark ~= -1) do
                bookmark = self.Alert:getBookmark(i + 1)
                self.Alert:setBookmark(i, bookmark)
                i = i + 1
            end
        end
        function alert:AddBookmark(period)
            local i = 1
            local bookmark = self.Alert:getBookmark(i)
            if bookmark == period then
                return
            end
            self.Alert:setBookmark(1, period)
            while (bookmark ~= -1) do
                local last_bookmark = self.Alert:getBookmark(i + 1)
                self.Alert:setBookmark(i + 1, bookmark)
                bookmark = last_bookmark
                i = i + 1
            end
        end
        function alert:DownAlert(source, period, level, historical_period, metadata)
            if self.FilterConsecutive then
                local last_signal = self:GetLast(period - 1)
                if last_signal == -1 then
                    return
                end
            end
            local text = self.FormatMessage(source, period, level, self.Label, false, metadata)
            shift = indi_alerts.Live ~= "Live" and 1 or 0
            self.Alert[period] = -1
            self:AddBookmark(period)
            self.AlertLevel[period] = level
            self.U = nil
            if self.D ~= source:date(period) and period == source:size() - 1 - shift then
                self.D = source:date(period)
                if not historical_period then
                    indi_alerts:SoundAlert(self.Down)
                    indi_alerts:EmailAlert(self.Label, text, period)
                    indi_alerts:SendAlert(self.Label, text, period)
                    if indi_alerts.Show then
                        indi_alerts:Pop(self.Label, text)
                    end
                end
            end
        end
        function alert:UpAlert(source, period, level, historical_period, metadata)
            if self.FilterConsecutive then
                local last_signal = self:GetLast(period - 1)
                if last_signal == 1 then
                    return
                end
            end
            local text = self.FormatMessage(source, period, level, self.Label, true, metadata)
            shift = indi_alerts.Live ~= "Live" and 1 or 0
            self.Alert[period] = 1
            self:AddBookmark(period)
            self.AlertLevel[period] = level
            self.D = nil
            if self.U ~= source:date(period) and period == source:size() - 1 - shift then
                self.U = source:date(period)
                if not historical_period then
                    indi_alerts:SoundAlert(self.Up)
                    indi_alerts:EmailAlert(self.Label, text, period)
                    indi_alerts:SendAlert(self.Label, text, period)
                    if indi_alerts.Show then
                        indi_alerts:Pop(self.Label, text)
                    end
                end
            end
        end
        function alert:GetLast(period)
            local index = self.Alert:getBookmark(1)
            if index == -1 then
                return nil
            end
            return self.Alert[index], index, self.AlertLevel[index]
        end
        self.Alerts[#self.Alerts + 1] = alert
    end

    self.Email = self.SendEmail and instance.parameters.Email or nil
    assert(not (self.SendEmail) or (self.SendEmail and self.Email ~= ""), "E-mail address must be specified")
    self.RecurrentSound = instance.parameters.RecurrentSound

    if instance.parameters.advanced_alert_key ~= "" and instance.parameters.use_advanced_alert then
        self._advanced_alert_key = instance.parameters.advanced_alert_key
        require("http_lua")
        self._advanced_alert_timer = 1234
        core.host:execute("setTimer", self._advanced_alert_timer, 1)
    end
end

function indi_alerts:Pop(label, note)
    core.host:execute("prompt", 1, label, self.source:instrument() .. " " .. label .. " : " .. note)
end

function indi_alerts:SoundAlert(Sound)
    if not self.PlaySound then
        return
    end
    terminal:alertSound(Sound, self.RecurrentSound)
end

function indi_alerts:EmailAlert(label, Subject, period)
    if not self.SendEmail then
        return
    end

    local now = self.source:date(period)
    now = core.host:execute("convertTime", core.TZ_EST, self.ToTime, now)
    local DATA = core.dateToTable(now)
    local delim = "\013\010"
    local Note = profile:id() .. delim .. " Label : " .. label .. delim .. " Alert : " .. Subject
    local Symbol = "Instrument : " .. self.source:instrument()
    local Time =
        " Date : " ..
        DATA.month .. " / " .. DATA.day .. " Time:  " .. DATA.hour .. " / " .. DATA.min .. " / " .. DATA.sec
    local TF = "Time Frame : " .. source:barSize()
    local text = Note .. delim .. Symbol .. delim .. TF .. delim .. Time
    terminal:alertEmail(self.Email, profile:id(), text)
end

function indi_alerts:SendAlert(label, Subject, period)
    if not self.ShowAlert then
        return
    end

    local now = self.source:date(period)
    now = core.host:execute("convertTime", core.TZ_EST, self.ToTime, now)
    local DATA = core.dateToTable(now)
    local delim = "\013\010"
    local Note = profile:id() .. delim .. " Label : " .. label .. delim .. " Alert : " .. Subject
    local Symbol = "Instrument : " .. self.source:instrument()
    local Time =
        " Date : " ..
        DATA.month .. " / " .. DATA.day .. " Time:  " .. DATA.hour .. " / " .. DATA.min .. " / " .. DATA.sec
    local TF = "Time Frame : " .. source:barSize()
    local text = Note .. delim .. Symbol .. delim .. TF .. delim .. Time
    terminal:alertMessage(self.source:instrument(), self.source[NOW], text, self.source:date(NOW))
end

function indi_alerts:AlertTelegram(message, instrument, timeframe)
    local alert = {}
    alert.Text = message or ""
    alert.Instrument = instrument or ""
    alert.TimeFrame = timeframe or ""
    self._alerts[#self._alerts + 1] = alert
end

function Init()
    indicator:name("G-Channel Trend Detection")
    indicator:description("")
    indicator:requiredSource(core.Tick)
    indicator:type(core.Indicator)

    indicator.parameters:addGroup("Calculation")
    indicator.parameters:addInteger("Period", "Period", "", 100, 1, 2000)
    indicator.parameters:addBoolean("Signal", "Signal Mode", "", false)

    indicator.parameters:addGroup("Line Style")
    indicator.parameters:addColor("Up", "Up Color", "", core.rgb(0, 255, 0))
    indicator.parameters:addColor("Down", "Down Color", "", core.rgb(255, 0, 0))
    indicator.parameters:addColor("Neutral", "Neutral Color", "", core.rgb(128, 128, 128))

    indicator.parameters:addInteger("width", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style", core.FLAG_LINE_STYLE)

    indicator.parameters:addBoolean("Cloud", "Show Cloud", "", true)
    indicator.parameters:addBoolean("Lines", "Show Lines", "", true)
    indicator.parameters:addInteger("Transparency", "Transparency", "", 40, 0, 100)

    indicator.parameters:addGroup("Arrow Style")
    indicator.parameters:addInteger("Size", "Arrow Size", "", 20)
    indicator.parameters:addColor("clrUP", "Up Arrow", "", core.COLOR_UPCANDLE)
    indicator.parameters:addColor("clrDN", "Down Arrow", "", core.COLOR_DOWNCANDLE)

    indi_alerts:AddParameters(indicator.parameters)
    for i, alert in ipairs(alerts) do
        indi_alerts:AddAlert(alert.Name)
    end
end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- Parameters block

local Up, Down, Neutral

local first

local Period

local Cloud, Lines
local Transparency

local Top = nil
local Bottom = nil
-- Routine
function Prepare(nameOnly)
    local name = profile:id() .. "(" .. instance.source:name() .. ")"
    instance:name(name)

    if (nameOnly) then
        return
    end

    Up = instance.parameters.Up
    Down = instance.parameters.Down
    Neutral = instance.parameters.Neutral

    Signal = instance.parameters.Signal

    Cloud = instance.parameters.Cloud
    Lines = instance.parameters.Lines
    Transparency = instance.parameters.Transparency
    Transparency = 100 - Transparency

    Period = instance.parameters.Period

    source = instance.source
    first = source:first() + 1

    if Lines then
        a = instance:addStream("a", core.Line, name, "a", Neutral, first + Period)
        a:setPrecision(math.max(2, instance.source:getPrecision()))
        a:setWidth(instance.parameters.width)
        a:setStyle(instance.parameters.style)

        b = instance:addStream("b", core.Line, name, "b", Neutral, first + Period)
        b:setPrecision(math.max(2, instance.source:getPrecision()))
        b:setWidth(instance.parameters.width)
        b:setStyle(instance.parameters.style)

        Close = instance:addStream("Close", core.Line, name, "Close", Neutral, first)
        Average = instance:addStream("Average", core.Line, name, "Average", Neutral, first)

        Close:setWidth(instance.parameters.width)
        Close:setStyle(instance.parameters.style)
        Average:setWidth(instance.parameters.width)
        Average:setStyle(instance.parameters.style)
    else
        a = instance:addInternalStream(0, 0)
        b = instance:addInternalStream(0, 0)
        Close = instance:addInternalStream(0, 0)
        Average = instance:addInternalStream(0, 0)
    end

    Close:setPrecision(math.max(2, instance.source:getPrecision()))
    Average:setPrecision(math.max(2, instance.source:getPrecision()))
    if Cloud then
        instance:createChannelGroup("Group", "Group", Close, Average, Neutral, Transparency)
    end

    if Signal then
        Bar = instance:addStream("Bar", core.Bar, name, "Bar", Neutral, first)
        Bar:setPrecision(math.max(2, instance.source:getPrecision()))
        Bar:addLevel(0)
    else
        Bar = instance:addInternalStream(0, 0)
    end

    up =
        instance:createTextOutput(
        "Up",
        "Up",
        "Wingdings",
        instance.parameters.Size,
        core.H_Center,
        core.V_Bottom,
        instance.parameters.clrUP,
        0
    )
    down =
        instance:createTextOutput(
        "Dn",
        "Dn",
        "Wingdings",
        instance.parameters.Size,
        core.H_Center,
        core.V_Top,
        instance.parameters.clrDN,
        0
    )

    indi_alerts:Prepare()
    indi_alerts.source = instance.source
    instance:drawOnMainChart(true)
    instance:ownerDrawn(true)
end

function Draw(stage, context)
    indi_alerts:Draw(stage, context, source)
end
-- Indicator calculation routine
function Update(period, mode)

    --Indicator[1]:update(mode);
    a[period] = 0
    b[period] = 0
    Close[period] = source[period]

    if not source:hasData(period) or period <= first then
        return
    end

    a[period] = math.max(source[period], a[period - 1]) - (a[period - 1] - b[period - 1]) / Period
    b[period] = math.min(source[period], b[period - 1]) + (a[period - 1] - b[period - 1]) / Period
    Average[period] = (a[period] + b[period]) / 2

    if not source:hasData(period) or period <= first + Period then
        return
    end

    if Close[period] > Average[period] then
        Close:setColor(period, Up)
    elseif Close[period] < Average[period] then
        Close:setColor(period, Down)
    else
        Close:setColor(period, Neutral)
    end

    up:setNoData(period)
    down:setNoData(period)

    if Close[period] < Average[period] and Close[period - 1] >= Average[period - 1] then
        BearCondition = true
    else
        BearCondition = false
    end

    if Close[period] > Average[period] and Close[period - 1] <= Average[period - 1] then
        BullCondition = true
    else
        BullCondition = false
    end

    if BullCondition then
        Bar[period] = 1
        up:set(period, Average[period], "\217")
    elseif BearCondition then
        down:set(period, Average[period], "\218")
        Bar[period] = -1
    else
        Bar[period] = 0
    end
    for _, alert in ipairs(indi_alerts.Alerts) do
        Activate(alert, period, period ~= source:size() - 1)
    end
end

-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=31&p=159071#p159071

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