-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=68620

--+------------------------------------------------------------------+
--|                               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.drawing_layer = 2;
indi_alerts.inverted_arrows = false;

function Init()
    indicator:name("All Absolute Strength Trend");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);

    indicator.parameters:addString("MathMode", "Math method", "", "Stoch");
    indicator.parameters:addStringAlternative("MathMode", "RSI", "", "RSI");
    indicator.parameters:addStringAlternative("MathMode", "Stoch", "", "Stoch");
    indicator.parameters:addStringAlternative("MathMode", "DMI", "", "DMI");
    indicator.parameters:addStringAlternative("MathMode", "MACD", "", "MACD");
    
    indicator.parameters:addInteger("Length", "Evaluation period", "", 10);
    indicator.parameters:addInteger("PreSmooth", "Pre-Smoothing period", "", 1);
    indicator.parameters:addInteger("Smooth", "Smoothing period", "", 10);
    AddAverages("MA_Method", "MA Method", "MVA");
    
    indicator.parameters:addString("LevelsMode", "Levels Mode", "", "obos");
    indicator.parameters:addStringAlternative("LevelsMode", "Standard OverBought/OverSold", "", "obos");
    indicator.parameters:addStringAlternative("LevelsMode", "StdDev Bands", "", "StdDev");
    indicator.parameters:addStringAlternative("LevelsMode", "High/Low Channel", "", "hilo");

    indicator.parameters:addDouble("StrengthLevel", "Strength Level", "", 70);
    indicator.parameters:addDouble("WeaknessLevel", "Weakness Level", "", 30);
    indicator.parameters:addInteger("LookBackPeriod", "LookBack Period for LevelsMode=1,2", "", 20);
    indicator.parameters:addDouble("UpperMultiplier", "Upper Band Multiplier", "", 1);
    indicator.parameters:addDouble("LowerMultiplier", "Lower Band Multiplier", "", 1);

    indicator.parameters:addColor("up_color", "Up color", "", core.rgb(0, 255, 0));
    indicator.parameters:addColor("dn_color", "Down color", "", core.rgb(255, 0, 0));
    indicator.parameters:addInteger("HL", "Transparency (%)", "", 95, 0, 100);

    indi_alerts:AddParameters(indicator.parameters);
    indi_alerts:AddAlert("Alert Signal");
end

function AddAverages(id, name, default)
    indicator.parameters:addString(id, name, "", default);
    indicator.parameters:addStringAlternative(id, "MVA", "", "MVA");
    indicator.parameters:addStringAlternative(id, "EMA", "", "EMA");
    indicator.parameters:addStringAlternative(id, "Wilder", "", "Wilder");
    indicator.parameters:addStringAlternative(id, "LWMA", "", "LWMA");
    indicator.parameters:addStringAlternative(id, "SineWMA", "", "SineWMA");
    indicator.parameters:addStringAlternative(id, "TriMA", "", "TriMA");
    indicator.parameters:addStringAlternative(id, "LSMA", "", "LSMA");
    indicator.parameters:addStringAlternative(id, "SMMA", "", "SMMA");
    indicator.parameters:addStringAlternative(id, "HMA", "", "HMA");
    indicator.parameters:addStringAlternative(id, "ZeroLagEMA", "", "ZeroLagEMA");
    indicator.parameters:addStringAlternative(id, "DEMA", "", "DEMA");
    indicator.parameters:addStringAlternative(id, "T3", "", "T3");
    indicator.parameters:addStringAlternative(id, "ITrend", "", "ITrend");
    indicator.parameters:addStringAlternative(id, "Median", "", "Median");
    indicator.parameters:addStringAlternative(id, "GeoMean", "", "GeoMean");
    indicator.parameters:addStringAlternative(id, "REMA", "", "REMA");
    indicator.parameters:addStringAlternative(id, "ILRS", "", "ILRS");
    indicator.parameters:addStringAlternative(id, "IE/2", "", "IE/2");
    indicator.parameters:addStringAlternative(id, "TriMAgen", "", "TriMAgen");
    indicator.parameters:addStringAlternative(id, "JSmooth", "", "JSmooth");
    indicator.parameters:addStringAlternative(id, "KAMA", "", "KAMA");
    indicator.parameters:addStringAlternative(id, "ARSI", "", "ARSI");
    indicator.parameters:addStringAlternative(id, "VIDYA", "", "VIDYA");
    indicator.parameters:addStringAlternative(id, "HPF", "", "HPF");
    indicator.parameters:addStringAlternative(id, "VAMA", "", "VAMA");
end

function CreateAverates(method, source, period)
    if method == "MVA" or method == "EMA" or method == "ARSI" 
        or method == "KAMA" or method == "LWMA" or method == "SMMA"
        or method == "VIDYA"
    then
        --assert(core.indicators:findIndicator(method) ~= nil, method .. " indicator must be installed");
        return core.indicators:create(method, source, period);
    end
    assert(core.indicators:findIndicator("AVERAGES") ~= nil, "Please, download and install AVERAGES indicator");
    return core.indicators:create("AVERAGES", source, method, period);
end

local MathMode, Length, LevelsMode, StrengthLevel, WeaknessLevel;
local mMA, mLo, atr;
local lbulls, lbears, Bulls, Bears, bulls, bears, trend, Smooth, upTrend, dnTrend, up_color, dn_color
function Prepare(nameOnly)
    indi_alerts:Prepare();
    indi_alerts.source = instance.source;
    if indi_alerts.drawing_layer >= 100 then
        instance:drawOnMainChart(true);
    else
        instance:ownerDrawn(true);
    end

    source = instance.source;
    MathMode = instance.parameters.MathMode;
    Length = instance.parameters.Length;
    LevelsMode = instance.parameters.LevelsMode;
    StrengthLevel = instance.parameters.StrengthLevel;
    WeaknessLevel = instance.parameters.WeaknessLevel;
    Smooth = instance.parameters.Smooth;
    up_color = instance.parameters.up_color;
    dn_color = instance.parameters.dn_color;
    local name = string.format("%s(%s)", profile:id(), source:name());
    instance:name(name);
    if nameOnly then
        return ;
    end
    mMA = CreateAverates(instance.parameters.MA_Method, source, instance.parameters.PreSmooth + 2);
    mLo = CreateAverates(instance.parameters.MA_Method, source, instance.parameters.PreSmooth + Length + 2);

    bulls = instance:addInternalStream(0, 0);
    bears = instance:addInternalStream(0, 0);
    trend = instance:addInternalStream(0, 0);

    lbulls = CreateAverates(instance.parameters.MA_Method, bulls, instance.parameters.PreSmooth + Length + 2);
    lbears = CreateAverates(instance.parameters.MA_Method, bears, instance.parameters.PreSmooth + Length + 2);

    Bulls = CreateAverates(instance.parameters.MA_Method, lbulls.DATA, instance.parameters.PreSmooth + Length + Smooth + 2);      
    Bears = CreateAverates(instance.parameters.MA_Method, lbears.DATA, instance.parameters.PreSmooth + Length + Smooth + 2);
    atr = core.indicators:create("ATR", source, 10);

    upTrend = instance:addInternalStream(0, 0);
    dnTrend = instance:addInternalStream(0, 0);
    instance:createChannelGroup("trend", "Trend", upTrend, dnTrend, up_color, 100 - instance.parameters.HL);
end

function Draw(stage, context) indi_alerts:Draw(stage, context, source); end

function Update(period, mode)
    if period < Length then
        return;
    end
    mMA:update(mode);
    mLo:update(mode);
    atr:update(mode);

    if (MathMode == "RSI") then
        bulls[period] = 0.5*(math.abs(mMA.DATA[period] - mMA.DATA[period - 1]) + (mMA.DATA[period] - mMA.DATA[period - 1]));
        bears[period] = 0.5*(math.abs(mMA.DATA[period] - mMA.DATA[period - 1]) - (mMA.DATA[period] - mMA.DATA[period - 1]));
    elseif (MathMode == "Stoch") then
        local up = 0;      
        local dn = 10000000000;
        for i = 0, Length - 1 do
            up = math.max(up, source.high[period - i]);
            dn = math.min(dn, source.low[period - i]);
        end
        bulls[period] = mMA.DATA[period] - dn;
        bears[period] = up - mMA.DATA[period];
    elseif(MathMode == "DMI") then
        bulls[period] = math.max(0,0.5*(math.abs(mMA.DATA[period] - mMA.DATA[period - 1]) + (mMA.DATA[period] - mMA.DATA[period - 1])));
        bears[period] = math.max(0,0.5*(math.abs(mLo.DATA[period - 1] - mLo.DATA[period]) + (mLo.DATA[period - 1] - mLo.DATA[period])));

        if (bulls[period] > bears[period]) then
            bears[period] = 0;
        elseif(bulls[period] < bears[period]) then
            bulls[period] = 0;
        else 
            bulls[period] = 0;
            bears[period] = 0;
        end
    elseif(MathMode == "MACD") then
        bulls[period] = 0.5*(math.abs(mMA.DATA[period] - mLo.DATA[period]) + (mMA.DATA[period] - mLo.DATA[period]));
        bears[period] = 0.5*(math.abs(mMA.DATA[period] - mLo.DATA[period]) - (mMA.DATA[period] - mLo.DATA[period]));
    end
    
    local len = Length;
    if (MathMode == "Stoch" or MathMode == "MACD") then
        len = 1;
    end
    lbulls:update(mode);
    lbears:update(mode);
    Bulls:update(mode);
    Bears:update(mode);

    local strength, weakness;
    if (LevelsMode == "obos") then
        strength = StrengthLevel / 100 * (Bulls.DATA[period] + Bears.DATA[period]);
        weakness = WeaknessLevel / 100 * (Bulls.DATA[period] + Bears.DATA[period]);
    else
        HiArray[period] = math.max(Bulls.DATA[period], Bears.DATA[period]);  
        LoArray[period] = math.min(Bulls.DATA[period], Bears.DATA[period]);

        if (LevelsMode == "StdDev") then
            strength = mathex.avg(HiArray, period - LookBackPeriod, period) + UpperMultiplier * mathex.stdev(HiArray, period - LookBackPeriod, period);
            weakness = mathex.avg(LoArray, period - LookBackPeriod, period) + LowerMultiplier * mathex.stdev(LoArray, period - LookBackPeriod, period);
        elseif (LevelsMode == "hilo") then
            dnPivot, upPivot = getPivots(HiArray, LoArray, period);
    
            strength = upPivot - (upPivot - dnPivot) * (1 - StrengthLevel / 100);
            weakness = dnPivot + (upPivot - dnPivot) * WeaknessLevel / 100;
        end
    end

    trend[period] = trend[period - 1];
    if (Bulls.DATA[period] > strength and Bulls.DATA[period] > Bears.DATA[period]) then
        trend[period] = 1;
    elseif (Bears.DATA[period] > strength and Bulls.DATA[period] < Bears.DATA[period]) then
        trend[period] =-1;
    end

    local delta = 0.5 * atr.DATA[period];

    if (trend[period] > 0) then
        if (Bulls.DATA[period] > Bears.DATA[period]) then
            upTrend[period] = math.max(source.open[period], source.close[period]);
            dnTrend[period] = math.min(source.open[period], source.close[period]);
            upTrend:setColor(period, up_color);
        end
    elseif (trend[period] < 0) then
        if (Bears.DATA[period] > Bulls.DATA[period]) then
            upTrend[period] = math.min(source.open[period], source.close[period]);
            dnTrend[period] = math.max(source.open[period], source.close[period]);
            upTrend:setColor(period, dn_color);
        end
    end

    for _, alert in ipairs(indi_alerts.Alerts) do Activate(alert, period, period ~= source:size() - 1); end
end

function getPivots(hi, lo, period)
    local max, imax = mathex.max(hi, period - LookBackPeriod, period);
    local min, imin = mathex.min(lo, period - LookBackPeriod, period);
    return min, max;  
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
        if indi_alerts.FIRST then indi_alerts.FIRST = false; end
        return;
    end
    if alert.id == 1 then
        if trend[period] > 0 and trend[period - 1] < 0 then
            alert:UpAlert(source, period, alert.Label .. ". Bull pattern", source.high[period], historical_period);
        elseif trend[period] < 0 and trend[period - 1] > 0 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 AsyncOperationFinished(cookie, success, message, message1, message2)
    indi_alerts:AsyncOperationFinished(cookie, success, message, message1, message2)
end

indi_alerts.Version = "1.10";
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

indi_alerts.init = false;

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.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.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.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.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;
function indi_alerts:Draw(stage, context)
    if stage ~= indi_alerts.drawing_layer then
        return;
    end
    if not self.init then
        local createFont = false;
        for _, level in ipairs(self.Alerts) do
            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
                createFont = true;
            end
        end
        if createFont and self.FONT_ID == nil then
            self.FONT_ID = self.NextId;
			self.NextId = self.NextId + 1;
            context:createFont(self.FONT_ID, "Wingdings", context:pointsToPixels(self.Size), context:pointsToPixels(self.Size), 0);
        end
        self.init = true;
    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
            self:DrawAlert(context, level, period);
        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.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