-- Id: 6113
-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=14960

--+------------------------------------------------------------------+
--|                               Copyright © 2018, Gehtsoft USA LLC |
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |
--|                                          mario.jemic@gmail.com   |
--+------------------------------------------------------------------+
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--+------------------------------------------------------------------+

function Init()
    indicator:name("MA Cross Alert");
    indicator:description("MA Cross Alert");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);

	indicator.parameters:addGroup("MA Calculation");	 
    indicator.parameters:addInteger("Period", "Period", "", 50, 1, 2000);
	indicator.parameters:addString("Method", "Method", "Method" , "MVA");
    indicator.parameters:addStringAlternative("Method", "MVA", "MVA" , "MVA");
    indicator.parameters:addStringAlternative("Method", "EMA", "EMA" , "EMA");
	indicator.parameters:addStringAlternative("Method", "LWMA", "LWMA" , "LWMA");
    indicator.parameters:addStringAlternative("Method", "TMA", "TMA" , "TMA");
    indicator.parameters:addStringAlternative("Method", "SMMA", "SMMA" , "SMMA");
    indicator.parameters:addStringAlternative("Method", "KAMA", "KAMA" , "KAMA");
    indicator.parameters:addStringAlternative("Method", "HMA", "HMA" , "HMA");
    indicator.parameters:addStringAlternative("Method", "WMA", "WMA" , "WMA");
	indicator.parameters:addStringAlternative("Method", "VIDYA", "VIDYA" , "VIDYA");
	
	indicator.parameters:addString("Price", "CLOSE", "", "close");
    indicator.parameters:addStringAlternative("Price", "OPEN", "", "open");
    indicator.parameters:addStringAlternative("Price", "HIGH", "", "high");
    indicator.parameters:addStringAlternative("Price", "LOW", "", "low");
    indicator.parameters:addStringAlternative("Price","CLOSE", "", "close");
    indicator.parameters:addStringAlternative("Price", "MEDIAN", "", "median");
    indicator.parameters:addStringAlternative("Price", "TYPICAL", "", "typical");
    indicator.parameters:addStringAlternative("Price", "WEIGHTED", "", "weighted");
	
	
	indicator.parameters:addGroup("Channel Calculation");
	indicator.parameters:addString("Type", "Shift Type", "", "ATR");
    indicator.parameters:addStringAlternative("Type", "ATR", "", "ATR");
    indicator.parameters:addStringAlternative("Type", "PIP", "", "PIP");
	
	 indicator.parameters:addInteger("AtrPeriod", "ATR Period", "", 50, 1, 2000);
	  indicator.parameters:addDouble("Size", "Shift in Pips", "", 50, 0, 2000);
	
	indicator.parameters:addBoolean("Show", "Show Channel", "", true);
	
	
	indicator.parameters:addGroup("Style");	
    indicator.parameters:addColor("Up", "Color of Uptrend", "", core.rgb(0, 255, 0));
	indicator.parameters:addColor("Down", "Color of Downtrend", "", core.rgb(255, 0, 0));
	
	indicator.parameters:addInteger("width", "Line width", "", 1, 1, 5);
    indicator.parameters:addInteger("style", "Line style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style", core.FLAG_LINE_STYLE);
	
	indicator.parameters:addGroup("Alerts");   
    indicator.parameters:addBoolean("PlaySound", "Play Sound", "", false);
    indicator.parameters:addFile("SoundFile", "Sound File", "", "");
    indicator.parameters:setFlag("SoundFile", core.FLAG_SOUND);
    indicator.parameters:addBoolean("RecurrentSound", "Recurrent Sound", "", false);

end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- TODO: Refine the first period calculation for each of the output streams.
-- TODO: Calculate all constants, create instances all subsequent indicators and load all required libraries
-- Parameters block

local Method, Period, Type;

local first;
local source = nil;
local Size;
-- Streams block
local MA = nil;
local Indicator;
local Price;
local Top, Bottom;
local ATR,AtrPeriod;
-- Routine
local  LastTime;
local PlaySound,  PlaySound,RecurrentSound ,SoundFile ;

 
function SoundAlert()
 if not PlaySound then
 return;
 end
 
 terminal:alertSound(SoundFile, RecurrentSound);
end

function Prepare(nameOnly)
    Size= instance.parameters.Size;
    Show = instance.parameters.Show;
    Type = instance.parameters.Type;
    Method = instance.parameters.Method;
	Period = instance.parameters.Period;
	Price = instance.parameters.Price;
	AtrPeriod = instance.parameters.AtrPeriod;
    source = instance.source;
    first = source:first();
	
	 PlaySound = instance.parameters.PlaySound;
    if PlaySound then
        SoundFile = instance.parameters.SoundFile;
    else
        SoundFile = nil;
    end
    assert(not(PlaySound) or (PlaySound and SoundFile ~= ""), "Sound file must be chosen"); 
    RecurrentSound = instance.parameters.RecurrentSound;
	
	 LastTime=nil;

    local name = profile:id() .. "(" .. source:name() .. ", " .. tostring(Price).. ", " .. tostring(Method) .. ", " .. tostring(Period) .. ", " .. tostring(Type).. ")";
    instance:name(name);
	
    if (not (nameOnly)) then
    assert(core.indicators:findIndicator(Method) ~= nil, Method .. " indicator must be installed");
        Indicator = core.indicators:create(Method, source[Price], Period);
        ATR  = core.indicators:create("ATR", source, AtrPeriod);
         first = Indicator.DATA:first();
   
        MA = instance:addStream("MA", core.Line, name, "MA", instance.parameters.Up, first);
		MA:setWidth(instance.parameters.width);
        MA:setStyle(instance.parameters.style);
		
		if Show then
		Top  = instance:addStream("TOP", core.Line, name, "Top", instance.parameters.Up, first);
		Bottom = instance:addStream("BOTTOM", core.Line, name, "Bottom", instance.parameters.Down, first);
		else
		Top  = instance:addInternalStream(0, 0);
		Bottom = instance:addInternalStream(0, 0);
		end

    end
end

-- Indicator calculation routine
-- TODO: Add your code for calculation output values
function Update(period, mode)
    if period < first or not source:hasData(period) then
	return;
	end
	
		Indicator:update(mode);
		ATR:update(mode);
		
		local Shift;
		
		if Type == "ATR" then
		Shift=ATR.DATA[period];		
		else
		Shift=Size*source:pipSize();	
		end

        MA[period] = Indicator.DATA[period];
		Top[period]=MA[period]+Shift;
		Bottom[period]=MA[period]-Shift;
		
		if MA[period] > MA[period-1] then
		MA:setColor(period,  instance.parameters.Up);
		elseif MA[period] < MA[period-1] then
		MA:setColor(period,  instance.parameters.Down);
		end		
		
		
	 
		if source.close[source:size()-1]>  Bottom[Bottom:size()-1] 
		and  source.close[source:size()-1]<  Top[Top:size()-1]
        then
		     if period==source:size()-1 and LastTime~=source:date(period) then
             LastTime=source:date(period);
		     SoundAlert();
             end	
    end
end

function AsyncOperationFinished (cookie, success, message)
end