-- Id: 9391

-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=41462

--+------------------------------------------------------------------+
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--|                                            http://fxcodebase.com |
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--|                                      Developed by : Mario Jemic  |                    
--|                                          mario.jemic@gmail.com   |
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--+------------------------------------------------------------------+

function Init()
    indicator:name("Inverse reaction oscillator");
    indicator:description("Inverse reaction oscillator");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);

    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addInteger("Period", "Period", "", 3);
    indicator.parameters:addString("Method", "Method", "", "MVA");
    indicator.parameters:addStringAlternative("Method", "MVA", "", "MVA");
    indicator.parameters:addStringAlternative("Method", "EMA", "", "EMA");
    indicator.parameters:addStringAlternative("Method", "KAMA", "", "KAMA");
    indicator.parameters:addStringAlternative("Method", "Wilder", "", "Wilder");
    indicator.parameters:addStringAlternative("Method", "LWMA", "", "LWMA");
    indicator.parameters:addStringAlternative("Method", "SineWMA", "", "SineWMA");
    indicator.parameters:addStringAlternative("Method", "TriMA", "", "TriMA");
    indicator.parameters:addStringAlternative("Method", "LSMA", "", "LSMA");
    indicator.parameters:addStringAlternative("Method", "SMMA", "", "SMMA");
    indicator.parameters:addStringAlternative("Method", "HMA", "", "HMA");
    indicator.parameters:addStringAlternative("Method", "ZeroLagEMA", "", "ZeroLagEMA");
    indicator.parameters:addStringAlternative("Method", "DEMA", "", "DEMA");
    indicator.parameters:addStringAlternative("Method", "T3", "", "T3");
    indicator.parameters:addStringAlternative("Method", "ITrend", "", "ITrend");
    indicator.parameters:addStringAlternative("Method", "Median", "", "Median");
    indicator.parameters:addStringAlternative("Method", "GeoMean", "", "GeoMean");
    indicator.parameters:addStringAlternative("Method", "REMA", "", "REMA");
    indicator.parameters:addStringAlternative("Method", "ILRS", "", "ILRS");
    indicator.parameters:addStringAlternative("Method", "IE/2", "", "IE/2");
    indicator.parameters:addStringAlternative("Method", "TriMAgen", "", "TriMAgen");
    indicator.parameters:addStringAlternative("Method", "JSmooth", "", "JSmooth");
    indicator.parameters:addDouble("Coeff", "Coeff", "", 1.618);

    indicator.parameters:addGroup("Style");
    indicator.parameters:addColor("COclr", "C-O color", "C-O color", core.rgb(0, 255, 0));
    indicator.parameters:addColor("Uclr", "U signal color", "U signal color", core.rgb(255, 0, 0));
    indicator.parameters:addColor("Dclr", "D signal color", "D signal color", core.rgb(0, 0, 255));
    indicator.parameters:addInteger("widthLinReg", "Line width", "Line width", 1, 1, 5);
    indicator.parameters:addInteger("styleLinReg", "Line style", "Line style", core.LINE_SOLID);
    indicator.parameters:setFlag("styleLinReg", core.FLAG_LINE_STYLE);
end

local first;
local source = nil;
local Period;
local Method;
local Coeff;
local AbsCO;
local MA;
local CO=nil;
local U=nil;
local D=nil;

function Prepare(nameOnly)
    source = instance.source;
    Period=instance.parameters.Period;
    Method=instance.parameters.Method;
    Coeff=instance.parameters.Coeff;
	
	
	local name = profile:id() .. "(" .. source:name() .. ", " .. instance.parameters.Period .. ", " .. instance.parameters.Method .. ", " .. instance.parameters.Coeff .. ")";
    instance:name(name);
	
	if   (nameOnly) then
        return;
    end
	
	
    AbsCO = instance:addInternalStream(0, 0);
	
	assert(core.indicators:findIndicator("AVERAGES") ~= nil, "Please, download and install AVERAGES.LUA indicator");    
    MA = core.indicators:create("AVERAGES", AbsCO, Method, Period, false);
	first = MA.DATA:first();
    
    CO = instance:addStream("CO", core.Bar, name .. ".CO", "CO", instance.parameters.COclr, first);
    U = instance:addStream("U", core.Line, name .. ".U", "U", instance.parameters.Uclr, first);
    D = instance:addStream("D", core.Line, name .. ".D", "D", instance.parameters.Dclr, first);
    U:setWidth(instance.parameters.widthLinReg);
    U:setStyle(instance.parameters.styleLinReg);
    D:setWidth(instance.parameters.widthLinReg);
    D:setStyle(instance.parameters.styleLinReg);
	
	CO:setPrecision(math.max(2, instance.source:getPrecision()));
	U:setPrecision(math.max(2, instance.source:getPrecision()));
	D:setPrecision(math.max(2, instance.source:getPrecision()));
end

function Update(period, mode)
   if period>first then
    CO[period]=source.close[period]-source.open[period];
    AbsCO[period]=math.abs(CO[period]);
    MA:update(mode);
    U[period]=Coeff*MA.DATA[period];
    D[period]=-U[period];
   end 
end