-- Id: 16119
-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=63526

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-- Indicator profile initialization routine
-- Defines indicator profile properties and indicator parameters
-- TODO: Add minimal and maximal value of numeric parameters and default color of the streams
function Init()
    indicator:name("Pivot based oscillator");
    indicator:description("");
    indicator:requiredSource(core.Tick);
    indicator:type(core.Oscillator);
    indicator.parameters:addGroup("Calculation");	
    indicator.parameters:addInteger("Period1", "Period", "Period",13);
    indicator.parameters:addString("Method1", "MA Method", "Method" , "EMA");
    indicator.parameters:addStringAlternative("Method1", "MVA", "MVA" , "MVA");
    indicator.parameters:addStringAlternative("Method1", "EMA", "EMA" , "EMA");
    indicator.parameters:addStringAlternative("Method1", "LWMA", "LWMA" , "LWMA");
    indicator.parameters:addStringAlternative("Method1", "TMA", "TMA" , "TMA");
    indicator.parameters:addStringAlternative("Method1", "SMMA", "SMMA" , "SMMA");
    indicator.parameters:addStringAlternative("Method1", "KAMA", "KAMA" , "KAMA");
    indicator.parameters:addStringAlternative("Method1", "VIDYA", "VIDYA" , "VIDYA");
    indicator.parameters:addStringAlternative("Method1", "WMA", "WMA" , "WMA");
	
	
	indicator.parameters:addInteger("Period2", "Period", "Period",21);
    indicator.parameters:addString("Method2", "MA Method", "Method" , "EMA");
    indicator.parameters:addStringAlternative("Method2", "MVA", "MVA" , "MVA");
    indicator.parameters:addStringAlternative("Method2", "EMA", "EMA" , "EMA");
    indicator.parameters:addStringAlternative("Method2", "LWMA", "LWMA" , "LWMA");
    indicator.parameters:addStringAlternative("Method2", "TMA", "TMA" , "TMA");
    indicator.parameters:addStringAlternative("Method2", "SMMA", "SMMA" , "SMMA");
    indicator.parameters:addStringAlternative("Method2", "KAMA", "KAMA" , "KAMA");
    indicator.parameters:addStringAlternative("Method2", "VIDYA", "VIDYA" , "VIDYA");
    indicator.parameters:addStringAlternative("Method2", "WMA", "WMA" , "WMA");
	
	
	indicator.parameters:addInteger("Period3", "Period", "Period",34);
    indicator.parameters:addString("Method3", "MA Method", "Method" , "EMA");
    indicator.parameters:addStringAlternative("Method3", "MVA", "MVA" , "MVA");
    indicator.parameters:addStringAlternative("Method3", "EMA", "EMA" , "EMA");
    indicator.parameters:addStringAlternative("Method3", "LWMA", "LWMA" , "LWMA");
    indicator.parameters:addStringAlternative("Method3", "TMA", "TMA" , "TMA");
    indicator.parameters:addStringAlternative("Method3", "SMMA", "SMMA" , "SMMA");
    indicator.parameters:addStringAlternative("Method3", "KAMA", "KAMA" , "KAMA");
    indicator.parameters:addStringAlternative("Method3", "VIDYA", "VIDYA" , "VIDYA");
    indicator.parameters:addStringAlternative("Method3", "WMA", "WMA" , "WMA");
	
	indicator.parameters:addGroup("Style");	 
    indicator.parameters:addColor("Up", "Color of Up", "Color of Up", core.rgb(0, 255, 0));	
    indicator.parameters:addColor("Down", "Color of Up", "Color of Down", core.rgb(255, 0, 0));

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 Period1, Method1, ma1;
local Period2, Method2, ma2;
local Period3, Method3, ma3;
local PP;
local first;
local source = nil;
local Up, Down;
-- Routine
function Prepare(nameOnly)
    Period1 = instance.parameters.Period1;
    Method1 = instance.parameters.Method1;
	
	Period2 = instance.parameters.Period2;
    Method2 = instance.parameters.Method2;
	
	Period3 = instance.parameters.Period3;
    Method3 = instance.parameters.Method3;
	
	Up = instance.parameters.Up;
	Down = instance.parameters.Down;
	
    source = instance.source;
	
	local name = profile:id() .. "(" .. source:name()  .. ")";
    instance:name(name);
    if   (nameOnly) then
        return;
    end
	
    assert(core.indicators:findIndicator(Method1) ~= nil, Method1 .. " indicator must be installed");
	ma1 = core.indicators:create(Method1, source, Period1);
    assert(core.indicators:findIndicator(Method2) ~= nil, Method2 .. " indicator must be installed");
	ma2 = core.indicators:create(Method2, source, Period2);
    assert(core.indicators:findIndicator(Method3) ~= nil, Method3 .. " indicator must be installed");
	ma3 = core.indicators:create(Method3, source, Period3);
    first = math.max(ma1.DATA:first(),ma2.DATA:first(),ma3.DATA:first()); 
	
    
        PP = instance:addStream("PP", core.Bar, name .. ".PP", "PP", Up, first ); 
    PP:setPrecision(math.max(2, instance.source:getPrecision()));
    
end

-- Indicator calculation routine
-- TODO: Add your code for calculation output values
function Update(period,mode)
    
	ma1:update(mode);
	ma2:update(mode);
	ma3:update(mode);
	
    if period < first or not source:hasData(period) then
	return;
	end
	
	local Differential1= ma1.DATA[period]-ma3.DATA[period];
	local Differential2= ma2.DATA[period]-ma3.DATA[period];
	local Differential3= ma1.DATA[period]-ma2.DATA[period];
 
	 
        PP[period] = (Differential1+Differential2+Differential3)/3;
		
		if PP[period]>PP[period-1] then
		PP:setColor(period, Up);
		else
		PP:setColor(period, Down);
		end
		
    
end