-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=3102

--+------------------------------------------------------------------+
--|                               Copyright © 2021, Gehtsoft USA LLC |
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |
--|                                           mario.jemic@gmail.com  |
--|                          https://AppliedMachineLearning.systems  |
--+------------------------------------------------------------------+
--|                                 Support our efforts by donating  |
--|                                   Paypal: https://goo.gl/9Rj74e  |
--|                                  Patreon: https://goo.gl/GdXWeN  |
--+------------------------------------------------------------------+

local Number
local alert_threshold;
local Instrument = {}
local SourceData = {}
local Indicator = {}
local source
function GetCount(period)
	local positive = 0;
	local negative = 0;
	for j = 1, Number, 1 do
		local index = core.findDate(SourceData[j], source:date(period), false);
		if index < 0 or not Indicator[j].DATA:hasData(index) then
			return 0, 0;
		end
		if Indicator[j].DATA[index] < SourceData[j].close[index] then
			positive = positive + 1;
		elseif Indicator[j].DATA[index] > SourceData[j].close[index] then
			negative = negative + 1;
		end
	end
	return positive, negative;
end

local indi_alerts = {};
indi_alerts.Version = "2.2";
indi_alerts.inverted_arrows = false;
local alerts = 
{ 
    {
        Stage = 102,
        UpCondition = function (period)
			local positive = GetCount(period)
			return positive >= alert_threshold;
        end,
        DownCondition = function (period)
			local _, negative = GetCount(period)
			return negative >= alert_threshold;
        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 = "Alert Name"
    }
};

function Add(id, TF, Flag, Instrument)
	indicator.parameters:addGroup(id .. ". Slot")
	indicator.parameters:addBoolean("On" .. id, "Show This Slot", "", true)

	indicator.parameters:addString("TF" .. id, "Time Frame ", "", TF)
	indicator.parameters:setFlag("TF" .. id, core.FLAG_PERIODS)

	indicator.parameters:addString("Instrument" .. id, "Instrument", "", Instrument)
	indicator.parameters:setFlag("Instrument" .. id, core.FLAG_INSTRUMENTS)

	indicator.parameters:addInteger("FM" .. id, "Line " .. id .. ". Period", "", 10)
	indicator.parameters:addDouble("MP" .. id, "Line " .. id .. ". Multiplier", "", 1.5)
end

function Init()
	indicator:name("SuperTrend_Heat_Map")
	indicator:description("")
	indicator:requiredSource(core.Bar)
	indicator:type(core.Oscillator)

	indicator.parameters:addGroup("Override")

	indicator.parameters:addString("Method", "Override Method", "Method", "Chart Instrument")
	indicator.parameters:addStringAlternative("Method", "Independent", "Independent", "Independent")
	indicator.parameters:addStringAlternative("Method", "Chart Time Frame", "Chart Time Frame", "Chart Time Frame")
	indicator.parameters:addStringAlternative("Method", "Chart Instrument", "Chart Instrument", "Chart Instrument")

	Add(1, "m1", "Off", "EUR/USD")
	Add(2, "m5", "Off", "USD/JPY")
	Add(3, "m15", "Off", "GBP/USD")
	Add(4, "m30", "Off", "USD/CHF")
	Add(5, "H1", "Off", "EUR/CHF")
	Add(6, "H2", "View", "AUD/USD")
	Add(7, "H3", "Off", "USD/CAD")
	Add(8, "H4", "View", "NZD/USD")
	Add(9, "H6", "Off", "NZD/USD")
	Add(10, "H8", "View", "EUR/JPY")
	Add(11, "D1", "Off", "GBP/JPY")
	Add(12, "W1", "Off", "CHF/JPY")
	Add(13, "M1", "Off", "GBP/CHF")

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

	indicator.parameters:addDouble("VSpace", "Vertical Spacing (%)", "", 5, 0, 50)
	indicator.parameters:addDouble("HSpace", "Horizontal Spacing (%)", "", 5, 0, 50)
	indicator.parameters:addDouble("_Size", "Font Size (%)", "", 90, 50, 200)

	indi_alerts:AddParameters(indicator.parameters);
	indicator.parameters:addInteger("alert_threshold", "Alert Threshold", "", 10);
    for i,alert in ipairs(alerts) do
        indi_alerts:AddAlert(alert.Name);
    end
end
local On = {}
local Method
local day_offset, week_offset
local Label = {"First", "Second", "Third", "Fourth"}

local VSpace, HSpace
local Color
local Size
local TF = {}
local loading = {}
local host
local RSI = {}
local Up, Down, Neutral

local FM = {}
local MP = {}

function Prepare(nameOnly)
	alert_threshold = instance.parameters.alert_threshold;
	source = instance.source
	VSpace = (instance.parameters.VSpace / 100)
	HSpace = (instance.parameters.HSpace / 100)
	Method = instance.parameters.Method

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

	host = core.host
	Size = instance.parameters._Size
	Color = instance.parameters.Color

	day_offset = host:execute("getTradingDayOffset")
	week_offset = host:execute("getTradingWeekOffset")
	local Id = 0
	Number = 0
	local name = profile:id() .. " " .. source:name() .. " : " .. source:barSize()
	instance:name(name .. " : " .. Method .. " ")
	if (nameOnly) then
		return
	end
    indi_alerts:Prepare();
    indi_alerts.source = instance.source;
    instance:drawOnMainChart(true);
    instance:ownerDrawn(true);

	local ifirst
	local s1, e1, s2, e2
	s1, e1 = core.getcandle(source:barSize(), 0, 0, 0)

	local iTF = {}
	for i = 1, 13, 1 do
		if Method == "Chart Time Frame" then
			iTF[i] = source:barSize()
		else
			iTF[i] = instance.parameters:getString("TF" .. i)
		end
	end

	assert(core.indicators:findIndicator("SUPERTREND") ~= nil, "Please, download and install SUPERTREND.LUA indicator")

	AlertNumber = 0
	for i = 1, 13, 1 do
		s2, e2 = core.getcandle(iTF[i], 0, 0, 0)

		if instance.parameters:getBoolean("On" .. i) and (e1 - s1) <= (e2 - s2) then
			Number = Number + 1
			FM[Number] = instance.parameters:getInteger("FM" .. i)
			MP[Number] = instance.parameters:getDouble("MP" .. i)

			Label[Number] = ""

			if Method == "Chart Instrument" then
				Instrument[Number] = source:instrument()
				Label[Number] = ""
			else
				Instrument[Number] = instance.parameters:getString("Instrument" .. i)
				Label[Number] = Instrument[Number]
			end

			if Method == "Chart Time Frame" then
				TF[Number] = iTF[i]
			else
				TF[Number] = iTF[i]
				Label[Number] = Label[Number] .. " - " .. TF[Number]
			end

			Temp1 = core.indicators:create("SUPERTREND", source, FM[Number], MP[Number])
			ifirst = Temp1.DATA:first() * 2

			Id = Id + 1
			SourceData[Number] =
				core.host:execute(
				"getSyncHistory",
				Instrument[Number],
				TF[Number],
				source:isBid(),
				math.max(300, ifirst),
				2000 + Id,
				1000 + Id
			)
			loading[Number] = true
			Indicator[Number] = core.indicators:create("SUPERTREND", SourceData[Number], FM[Number], MP[Number])
		end
	end

	instance:setLabelColor(Color)
	instance:ownerDrawn(true)
	core.host:execute("setTimer", 1, 1)
end

function ReleaseInstance()
	core.host:execute("killTimer", 1)
end

function Initialization(period, id)
	local Candle
	Candle = core.getcandle(source:barSize(), source:date(period), day_offset, week_offset)

	if loading[id] or SourceData[id]:size() == 0 then
		return false
	end

	if period < source:first() then
		return false
	end

	local P = core.findDate(SourceData[id], Candle, false)

	-- candle is not found
	if P < 0 then
		return false
	else
		return P
	end
end

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
local update_needed = true;
-- the function is called when the async operation is finished
function AsyncOperationFinished(cookie)
	local j
	local FLAG = false
	local Num = 0
	local Id = 0
	for j = 1, Number, 1 do
		Id = Id + 1
		if cookie == (1000 + Id) then
			loading[j] = true
			update_needed = true;
		elseif cookie == (2000 + Id) then
			loading[j] = false
		end

		if loading[j] then
			FLAG = true
			Num = Num + 1
		end
	end

	if not FLAG and cookie == 1 then
		for i = 1, Number, 1 do
			Indicator[i]:update(core.UpdateLast)
		end
		if update_needed then
			update_needed = false;
			core.host:trace("update");
			instance:updateFrom(0);
		end
	end

	if FLAG then
		core.host:execute("setStatus", "  Loading " .. ((Number) - Num) .. " / " .. (Number))
	else
		core.host:execute("setStatus", "Loaded")
	end
    indi_alerts:AsyncOperationFinished(cookie, success, message, message1, message2)
	return core.ASYNC_REDRAW
end

function Update(period)
	if update_needed then
		return;
	end
    for _, alert in ipairs(indi_alerts.Alerts) do Activate(alert, period, period ~= source:size() - 1); end
end

local init = false

function Draw(stage, context)
	indi_alerts:Draw(stage, context, source);
	if stage ~= 0 then
		return
	end

	local FLAG = false

	for j = 1, Number, 1 do
		if loading[j] then
			FLAG = true
		end
	end

	if FLAG then
		return
	end

	local style = context.SINGLELINE + context.CENTER + context.VCENTER

	context:setClipRectangle(context:left(), context:top(), context:right(), context:bottom())

	if not init then
		context:createPen(1, context.SOLID, 1, Color)
		context:createSolidBrush(2, Color)

		context:createPen(11, context.SOLID, 1, Up)
		context:createSolidBrush(12, Up)

		context:createPen(21, context.SOLID, 1, Down)
		context:createSolidBrush(22, Down)

		context:createPen(31, context.SOLID, 1, Neutral)
		context:createSolidBrush(32, Neutral)

		init = true
	end

	local first = math.max(source:first(), context:firstBar())
	local last = math.min(context:lastBar(), source:size() - 1)

	X0, X1, X2 = context:positionOfBar(source:size() - 1)
	HCellSize = (X2 - X1) * HSpace
	VCellSize = ((context:bottom() - context:top()) / (Number + 1))

	for i = first, last, 1 do
		x0, x1, x2 = context:positionOfBar(i)

		for j = 1, Number, 1 do
			p = Initialization(i, j)

			if p ~= false then
				if Indicator[j].DATA:hasData(p) then
					if Indicator[j].DATA[p] < SourceData[j].close[p] then
						C2 = 12
						C1 = 11
					elseif Indicator[j].DATA[p] > SourceData[j].close[p] then
						C2 = 22
						C1 = 21
					else
						C2 = 32
						C1 = 31
					end
				else
					C1 = 1
					C2 = 2
				end
			else
				C1 = 1
				C2 = 2
			end
			context:drawRectangle(
				C1,
				C2,
				x1 + HCellSize,
				context:top() + VCellSize / 2 + VCellSize * (j - 1) + VCellSize * VSpace,
				x2 - HCellSize,
				context:top() + VCellSize / 2 + VCellSize * (j) - VCellSize * VSpace
			)

			if i == first then
				local width, height
				context:createFont(3, "Arial", ((X2 - X1) / 100) * Size, (VCellSize / 100) * Size, context.NORMAL)
				Value = tostring(Label[j])
				width, height = context:measureText(3, Value, style)
				context:drawText(
					3,
					Value,
					Color,
					-1,
					X2 + (X2 - X1),
					context:top() + VCellSize / 2 + VCellSize * (j - 1) + VCellSize * VSpace,
					X2 + (X2 - X1) + width,
					context:top() + VCellSize / 2 + VCellSize * (j) - VCellSize * VSpace,
					style
				)
			end
		end
	end
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("Alert Style");
    indicator.parameters:addInteger("Size", "Label Size", "", 10, 1 , 100);
    
    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 = 42;
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