-- Available @ https://fxcodebase.com/code/viewtopic.php?f=17&t=73701

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--|                                                        https://AppliedMachineLearning.systems  |
--|                                                                       https://mario-jemic.com/ |
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-- Indicator profile initialization routine
-- Defines indicator profile properties and indicator parameters
function Init()
    indicator:name("Waddah Attar's Explosion Oscillator");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);
    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addInteger("Period", "ATR Period", "", 7);	
    indicator.parameters:addInteger("Period1", "Fast Period", "", 20);	
    indicator.parameters:addInteger("Period2", "Slow Period", "", 40);	
    indicator.parameters:addInteger("Period3", "BB Period", "", 20);		
    indicator.parameters:addDouble("Sensitivity", "Sensitivity Multiplier", "", 10);
    indicator.parameters:addDouble("DeadZone", "Dead Zone Multiplier", "", 50);
	
	indicator.parameters:addGroup("Calculation");
    indicator.parameters:addColor("TG_color", "Color of postive trend", "", core.rgb(0, 192, 0));
    indicator.parameters:addColor("TR_color", "Color of negative trend", "", core.rgb(192, 0, 0));
    indicator.parameters:addColor("E_color", "Color of explosion line", "", core.rgb(128, 64, 0));
	
    indicator.parameters:addColor("D_color", "Color of Dead Zone line", "", core.rgb(0, 255, 0));
    indicator.parameters:addColor("S_color", "Color of Sensitivity line", "", 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);
end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- Parameters block
local Sensitivity;
local DeadZone;

local first;
local firstBB;
local source = nil;

-- Streams block
local TG = nil;
local TR = nil;
local E = nil;

local EMAF = nil;
local EMAS = nil;
local BB_H = nil;
local BB_L = nil;

-- Routine
function Prepare(nameOnly)
    Sensitivity = instance.parameters.Sensitivity;
    DeadZone = instance.parameters.DeadZone;
	Period = instance.parameters.Period;
	Period1 = instance.parameters.Period1;
	Period2 = instance.parameters.Period2;	
	Period3 = instance.parameters.Period3;
    source = instance.source;


    local name = profile:id() .. "(" .. source:name() .. ", "    ..Period.. ", "    ..Period1.. ", "    ..Period2.. ", "    ..Sensitivity .. ", " .. DeadZone .. ")";
    instance:name(name);
    if nameOnly then
        return;
    end
    EMAF = core.indicators:create("EMA", source.close, Period1);
    EMAS = core.indicators:create("EMA", source.close, Period2);
	
    ATR = core.indicators:create("ATR", source, Period);
	
    first = math.max(EMAS.DATA:first(),EMAF.DATA:first(),ATR.DATA:first(),source:first()+Period3)
 

    TG = instance:addStream("TG", core.Bar, name .. ".TG", "TG", instance.parameters.TG_color, first);
    TG:setPrecision(math.max(2, instance.source:getPrecision()));
    TR = instance:addStream("TR", core.Bar, name .. ".TR", "TR", instance.parameters.TR_color, first);
    TR:setPrecision(math.max(2, instance.source:getPrecision()));
    Explosion = instance:addStream("Explosion", core.Line, name .. ".Explosion", "Explosion", instance.parameters.E_color, first);
    Explosion:setPrecision(math.max(2, instance.source:getPrecision()));
	Explosion:setWidth(instance.parameters.width);
	Explosion:setStyle(instance.parameters.style);
    Explosion:addLevel(0);
 
    DeadZoneLine = instance:addStream("DeadZoneLine", core.Line, name .. ".DeadZoneLine", "DeadZoneLine", instance.parameters.D_color, first);
    DeadZoneLine:setPrecision(math.max(2, instance.source:getPrecision()));
	DeadZoneLine:setWidth(instance.parameters.width);
	DeadZoneLine:setStyle(instance.parameters.style);	
 
    SensitivityLine = instance:addStream("SensitivityLine", core.Line, name .. ".SensitivityLine", "SensitivityLine", instance.parameters.S_color, first);
    SensitivityLine:setPrecision(math.max(2, instance.source:getPrecision()));
	SensitivityLine:setWidth(instance.parameters.width);
	SensitivityLine:setStyle(instance.parameters.style);	
 
end

-- Indicator calculation routine
function Update(period, mode)
    EMAF:update(mode);
    EMAS:update(mode);
    ATR:update(mode);
    if period <= first then
	return;
	end
	
        local p = core.rangeTo(period, Period3);
        local ml = core.avg(source.close, p);
        local d = core.stdev(source.close, p);
        BB_H = ml + 2 * d;
        BB_L = ml - 2 * d;
 
 
        trend = (MACD(period) - MACD(period - 1)) *(ATR.DATA[period]/source:pipSize());
 
        if trend > 0 then
            TG[period] = trend;
            TR[period] = 0;
        elseif trend < 0 then
            TG[period] = 0;
            TR[period] = -trend;
        end
        Explosion[period] =  BB_H - BB_L; 
		
		SensitivityLine[period]=((ATR.DATA[period])*Sensitivity) 
		DeadZoneLine[period]=((ATR.DATA[period])*DeadZone) 
   
end

function MACD(period)
    return EMAF.DATA[period] - EMAS.DATA[period];
end

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--|                                                                    We appreciate your support. | 
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--|                                                               Paypal: https://goo.gl/9Rj74e    |
--|                                                             Patreon :  https://goo.gl/GdXWeN   |  
--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                                       https://mario-jemic.com/ |
--+------------------------------------------------------------------------------------------------+

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