-- More information about this indicator can be found at:
-- http://fxcodebase.com/

--+------------------------------------------------------------------+
--|                               Copyright © 2019, Gehtsoft USA LLC |
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |
--|                                          mario.jemic@gmail.com   |
--+------------------------------------------------------------------+
--|                                 Support our efforts by donating  |
--|                                    Paypal: https://goo.gl/9Rj74e |
--+------------------------------------------------------------------+
--|                                Patreon :  https://goo.gl/GdXWeN  |
--|                    BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF  |
--|                BitCoin Cash: 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg  |
--|           Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D  |
--|                   LiteCoin : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD  |
--+------------------------------------------------------------------+

local indi_alerts = {};
indi_alerts.Version = "1.11";
indi_alerts.inverted_arrows = false;
local alert_stages = { 2 };

function IsUpCondition(period)

    if Indicator== nil or period <= Indicator.DATA:first() or   Indicator.DATA:size()-1 < 2 then
    return false;
	else
    return core.crossesOver(Indicator.DATA, 0, period);	
    end
	

end

function IsDownCondition(period)

    if Indicator== nil or period <= Indicator.DATA:first() or  Indicator.DATA:size()-1 < 2  then
    return false;
	else
    return core.crossesUnder(Indicator.DATA, 0, period);	
    end
	

end

function Init()
    indicator:name("CCI with targets")
    indicator:description("")
    indicator:requiredSource(core.Bar)
    indicator:type(core.Indicator)
    
    indicator.parameters:addString("TF", "Indicator Time Frame", "", "D1")
    indicator.parameters:setFlag("TF", core.FLAG_BARPERIODS_EDIT)
    indicator.parameters:addInteger("cci_period", "CCI Period", "Period", 20)
    
    indicator.parameters:addDouble("Level1", "1. Target Ratio", "", 1)
    indicator.parameters:addDouble("Level2", "2. Target Ratio", "", 1.5)
    indicator.parameters:addDouble("Level3", "3. Target Ratio", "", 2)
    indicator.parameters:addDouble("Level4", "Trigger Line (in pips)", "", 0)

    indicator.parameters:addBoolean("Historical", "Show Historical", "", true)
    indicator.parameters:addString("ShowLabel", "Show Label", "", "no")
    indicator.parameters:addStringAlternative("ShowLabel", "Do not show", "", "no")
    indicator.parameters:addStringAlternative("ShowLabel", "At the left", "", "left")
    indicator.parameters:addStringAlternative("ShowLabel", "At the right", "", "right")

    indicator.parameters:addInteger("Lookback", "Label Lookback Period", "", 100)

    indicator.parameters:addGroup("Line Style")
    indicator.parameters:addColor("StartLineColor", "Start Line Color", "", core.rgb(0, 0, 255))
    indicator.parameters:addInteger("width1", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style1", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style1", core.FLAG_LINE_STYLE)

    indicator.parameters:addGroup("Label Style")
    indicator.parameters:addColor("LabelColor", "Label Color", "", core.COLOR_LABEL)
    indicator.parameters:addBoolean("LabelBackground", "Add Label Background", "", false)
    indicator.parameters:addColor("LabelBackgroundColor", "Label Background Color", "", core.COLOR_BACKGROUND)
    indicator.parameters:addInteger("FontSize", "Label Size", "", 8)
    indicator.parameters:addColor("StopLineColor", "Stop Line Color", "", core.rgb(255, 0, 0))
    indicator.parameters:addInteger("width2", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style2", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style2", core.FLAG_LINE_STYLE)

    indicator.parameters:addColor("TargetLineColor1", "1. Target Line Color", "", core.rgb(0, 255, 0))
    indicator.parameters:addInteger("width3", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style3", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style3", core.FLAG_LINE_STYLE)

    indicator.parameters:addColor("TargetLineColor2", "2. Target  Line Color", "", core.rgb(0, 255, 0))
    indicator.parameters:addInteger("width4", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style4", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style4", core.FLAG_LINE_STYLE)

    indicator.parameters:addColor("TargetLineColor3", "3. Target  Line Color", "", core.rgb(0, 255, 0))
    indicator.parameters:addInteger("width5", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style5", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style5", core.FLAG_LINE_STYLE)

    indicator.parameters:addColor("TargetLineColor4", "Trigger Line Color", "", core.rgb(0, 255, 0))
    indicator.parameters:addInteger("width6", "Line width", "", 1, 1, 5)
    indicator.parameters:addInteger("style6", "Line style", "", core.LINE_SOLID)
    indicator.parameters:setFlag("style6", core.FLAG_LINE_STYLE)

    indi_alerts:AddParameters(indicator.parameters);
    indi_alerts:AddAlert("CCI/0")
end

local Number = 1
local Size
local Show
local Live
local FIRST = true
local OnlyOnce
local UpTrendColor, DownTrendColor
local OnlyOnceFlag
local ShowAlert
local Shift = 0

local first
local source = nil
local btf_source = nil
local position = nil

local FontSize, LabelColor, font

local Level1, Level2, Level3, Level4
local LabelBackgroundColor
local LabelBackground
local Historical, ShowLabel
local Lookback
local TF
local dayoffset
local weekoffset
local cci_period

local labels = {}
local last_label_id = 0;
function CreateLabel(color, style, width)
    local label = {};
    label.Id = last_label_id + 1;
    label.LabelId = last_label_id + 2;
    label.Color = color;
    label.Style = style;
    label.Width = width;
    last_label_id = label.LabelId;
    function label:Draw(p, color)
        local str = win32.formatNumber(self.Rate, false, source:getPrecision());
        core.host:execute("drawLine", New(p, self.Id), self.DateEnd, self.Rate, self.Date, self.Rate, self.Color, self.Style, self.Width, str)
        if not LabelBackground and ShowLabel ~= "no" then
            if ShowLabel == "left" then
                core.host:execute("drawLabel1", New(p, self.LabelId), self.DateEnd, core.CR_CHART, self.Rate, core.CR_CHART, core.H_Right, core.V_Top, font, LabelColor, self.Text)
            else
                core.host:execute("drawLabel1", New(p, self.LabelId), self.Date, core.CR_CHART, self.Rate, core.CR_CHART, core.H_Left, core.V_Top, font, LabelColor, self.Text)             --   date = source:date(period)
            end
        end
    end
    return label;
end

function Prepare(nameOnly)
    local name = profile:id() .. "(" .. instance.source:name() .. ")"
    instance:name(name)
    if (nameOnly) then
        return
    end
    indi_alerts:Prepare();
    indi_alerts.source = instance.source;
    instance:drawOnMainChart(true);
    instance:ownerDrawn(true);
    cci_period = instance.parameters.cci_period;

    dayoffset  = core.host:execute("getTradingDayOffset")
    weekoffset = core.host:execute("getTradingWeekOffset")
    source = instance.source
    TF = instance.parameters.TF
    local s1, e1, s2, e2
    s1, e1 = core.getcandle(source:barSize(), 0, 0, 0)
    s2, e2 = core.getcandle(TF, 0, 0, 0)
    assert((e1 - s1) <= (e2 - s2), "The chosen time frame must be equal to or bigger than the chart time frame!")

    btf_source = core.host:execute("getSyncHistory", source:instrument(), TF, source:isBid(), 0, 100, 101)
    loading    = true

    LabelBackgroundColor = instance.parameters.LabelBackgroundColor
    LabelBackground = instance.parameters.LabelBackground
    FontSize = instance.parameters.FontSize
    LabelColor = instance.parameters.LabelColor
    Historical = instance.parameters.Historical
    ShowLabel = instance.parameters.ShowLabel

    font = core.host:execute("createFont", "Arial", FontSize, false, false)

    OnlyOnceFlag = true
    FIRST = true
    OnlyOnce = instance.parameters.OnlyOnce
    Show = instance.parameters.Show
    Live = instance.parameters.Live
    Lookback = instance.parameters.Lookback

    Level1 = instance.parameters.Level1
    Level2 = instance.parameters.Level2
    Level3 = instance.parameters.Level3
    Level4 = instance.parameters.Level4
    
    labels[#labels + 1] = CreateLabel(instance.parameters.StartLineColor, instance.parameters.style1, instance.parameters.width1);
    labels[#labels + 1] = CreateLabel(instance.parameters.StopLineColor, instance.parameters.style2, instance.parameters.width2);
    labels[#labels + 1] = CreateLabel(instance.parameters.TargetLineColor1, instance.parameters.style3, instance.parameters.width3);
    labels[#labels + 1] = CreateLabel(instance.parameters.TargetLineColor2, instance.parameters.style4, instance.parameters.width4);
    labels[#labels + 1] = CreateLabel(instance.parameters.TargetLineColor3, instance.parameters.style5, instance.parameters.width5);
    if Level4 ~= 0 then
        labels[#labels + 1] = CreateLabel(instance.parameters.TargetLineColor4, instance.parameters.style6, instance.parameters.width6);
    end

    first = source:first() + 1

    position = instance:addInternalStream(0, 0)

    Indicator = core.indicators:create("CCI", btf_source, cci_period);

    FIRST_CANDLE = nil
end

local init = false
function Draw(stage, context)
    indi_alerts:Draw(stage, context, source);
    if stage ~= 2 then
        return
    end
    if not init then
        context:createFont(2, "Arial", 0, context:pointsToPixels(FontSize), 0)
        context:createSolidBrush(3, LabelBackgroundColor)
        init = true
    end
    for _, label in ipairs(labels) do
        DrawLabel(label, context)
    end
end

function DrawLabel(label, context)
    if label.Text ~= nil then
        local visible, y = context:pointOfPrice(label.Rate)
        local width, height = context:measureText(2, label.Text, 0)
        local x
        local pos
        if ShowLabel == "left" then
            x = context:positionOfDate(label.DateEnd)
            pos = context.RIGHT + context.TOP
        else
            x = context:positionOfDate(label.Date) - width
            pos = context.LEFT + context.TOP
        end
        context:drawText(2, label.Text, LabelColor, LabelBackgroundColor, x, y - height, x + width, y, pos)
    end
end

local ID = 0
local ids = {}
function New(period, id)
    if ids[period] == nil then
        ids[period] = {}
    end
    if ids[period][id] == nil then
        ids[period][id] = ID + 1
        ID = ID + 1
    end
    return ids[period][id]
end

function GetPeriod(period)
    local Candle = core.getcandle(TF, source:date(period), dayoffset, weekoffset)
    if loading or btf_source:size() == 0 then
        return false
    end
    if period < source:first() then
        return false
    end

    local p = core.findDate(btf_source, Candle, false)
    -- candle is not found
    if p < 0 then
        return false
    else
        return p
    end
end

function GetPrevPeriod(p)
    if p == 0 then
        return -1;
    end
    local prev_date = btf_source:date(p - 1);
    return core.findDate(source, prev_date, false);
end

function Update(period, mode)
    Indicator:update(mode);
    local P = GetPeriod(period)
    if not P then
        return
    end
    if period < first then
        ID = 0
        return
    elseif period == first then
        ID = 0
    end
    local prev_period = GetPrevPeriod(P);
    if (period == first or prev_period == -1) then
        position[period] = 0
    else
        position[period] = position[period - 1]
    end

    if position[period] ~= -1 and IsDownCondition(P) then
        position[period] = -1
    elseif position[period] ~= 1 and IsUpCondition(P) then
        position[period] = 1
    end

    if (not Historical and period < source:size() - 1) or (Historical and period < source:size() - 1 - Lookback) then
        return
    end

    local p = FindLast(period)
    local Delta
    if p ~= 0 then
        local signalVal = source.close[period];
        if position[p] == 1 then
            Delta = math.abs(signalVal - source.high[p])
            labels[1].Rate = source.high[p]
            labels[2].Rate = source.high[p] - Delta;
            labels[3].Rate = source.high[p] + Delta * Level1
            labels[4].Rate = source.high[p] + Delta * Level2
            labels[5].Rate = source.high[p] + Delta * Level3
            if labels[6] ~= nil then
                labels[6].Rate = source.high[p] + source:pipSize() * Level4
            end
        elseif position[p] == -1 then
            Delta = math.abs(signalVal - source.low[p])
            labels[1].Rate = source.low[p]
            labels[2].Rate = source.low[p] + Delta;
            labels[3].Rate = source.low[p] - Delta * Level1
            labels[4].Rate = source.low[p] - Delta * Level2
            labels[5].Rate = source.low[p] - Delta * Level3
            if labels[6] ~= nil then
                labels[6].Rate = source.low[p] - source:pipSize() * Level4
            end
        else
            return;
        end
        labels[1].Text = string.format("Entry : %s", labels[1].Rate)
        labels[2].Text = string.format("Stop : %s (%s)", labels[2].Rate, win32.formatNumber(Delta / source:pipSize(), false, 1))
        labels[3].Text = string.format("1. Target : %s (%s)", win32.formatNumber(labels[3].Rate, false, source:getPrecision()), win32.formatNumber(Delta * Level1 / source:pipSize(), false, 1))
        labels[4].Text = string.format("2. Target : %s (%s)", win32.formatNumber(labels[4].Rate, false, source:getPrecision()), win32.formatNumber((Delta * Level2) / source:pipSize(), false, 1))
        labels[5].Text = string.format("3. Target : %s (%s)", win32.formatNumber(labels[5].Rate, false, source:getPrecision()), win32.formatNumber((Delta * Level3) / source:pipSize(), false, 1))
        if labels[6] ~= nil then
            labels[6].Text = string.format("Trigger : %s (%s)", win32.formatNumber(labels[6].Rate, false, source:getPrecision()), win32.formatNumber(Level4, false, 1))
        end

        for i,label in ipairs(labels) do
            label.Date = source:date(period)
            label.DateEnd = source:date(p)
            label:Draw(p);
        end
    end
    for _, alert in ipairs(indi_alerts.Alerts) do Activate(alert,P, period, period ~= source:size() - 1); end
end

function Activate(alert, P, period, historical_period)
    if indi_alerts.Live ~= "Live" then period = period - 1; end
    alert.Alert[period] = 0;
    if not alert.ON then
        if indi_alerts.FIRST then indi_alerts.FIRST = false; end
        return;
    end
    if alert.id == 1 then
        if (IsUpCondition(P)) then
            alert:UpAlert(source, period, alert.Label .. ". Bull pattern", source.high[period], historical_period);
        elseif (IsDownCondition(P)) then
            alert:DownAlert(source, period, alert.Label .. ". Bear pattern", source.low[period], historical_period);
        end
    end

    if indi_alerts.FIRST then indi_alerts.FIRST = false; end
end

function ReleaseInstance()
    core.host:execute("deleteFont", font)
end

function FindLast(period)
    for i = period, first, -1 do
        if position[i] ~= position[i - 1] then
            return i
        end
    end

    return 0;
end

-- the function is called when the async operation is finished
function AsyncOperationFinished(cookie)
    indi_alerts:AsyncOperationFinished(cookie, success, message, message1, message2)
    if cookie == 100 then
        loading = false
     instance:updateFrom(0)
    elseif cookie == 101 then
        loading = true
    end
end

indi_alerts.last_id = 0;
indi_alerts.FIRST = true;
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", "", true);
    indicator.parameters:addBoolean("ShowAlert", "Show Alert", "", true);
    
    indicator.parameters:addGroup("Alerts Sound");
    indicator.parameters:addBoolean("PlaySound", "Play Sound", "", true);    
    indicator.parameters:addBoolean("RecurrentSound", "Recurrent Sound", "", false);
    
    indicator.parameters:addGroup("Alerts Email");
    indicator.parameters:addBoolean("SendEmail", "Send Email", "", true);
    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;
    local i;
    for i = 1, 100 do 
        local on = instance.parameters:getBoolean("ON" .. i);
        if on == nil then
            break;
        end 
        local alert = {};
        alert.id = i;
        alert.Stage = alert_stages[i];
        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:DownAlert(source, period, text, level, historical_period)
            shift = indi_alerts.Live ~= "Live" and 1 or 0;
            self.Alert[period] = -1;
            self.AlertLevel[period] = level;
            self.U = nil;
            if self.D ~= source:serial(period) and period == source:size() - 1 - shift and not indi_alerts.FIRST then
                self.D = source:serial(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, text, level, historical_period)
            shift = indi_alerts.Live ~= "Live" and 1 or 0;
            self.Alert[period] = 1;
            self.AlertLevel[period] = level;
            self.D = nil;
            if self.U ~= source:serial(period) and period == source:size() - 1 - shift and not indi_alerts.FIRST then
                self.U = source:serial(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)
            for i = period, 0, -1 do
                if self.Alert:hasData(i) and self.Alert[i] ~= 0 then
                    return self.Alert[i], i, self.AlertLevel[i];
                end
            end
        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