-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=65860

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-- Indicator profile initialization routine

function Init()
    indicator:name("Adaptive Moving Average");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
	
	indicator.parameters:addGroup("Calculation"); 
    indicator.parameters:addInteger("Period", "Period", "", 10, 2, 2000);
 
	
	indicator.parameters:addGroup("Style"); 	
    indicator.parameters:addColor("color", "Line Color", "", core.rgb(255, 0, 0));
	indicator.parameters:addInteger("style", "Line Style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style", core.FLAG_LEVEL_STYLE);	
	indicator.parameters:addInteger("width", "Line Width", "", 3, 1, 5);
	
end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- Parameters block

local Period 
local first;
local source = nil;

local Pds,FastSC,SlowSC;

 
local AAA;  
 

-- Routine
 function Prepare(nameOnly)   
 
     Period= instance.parameters.Period;
 
    local name = profile:id() .. "(" ..  instance.source:name().. ", " ..  Period  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end
	
	
	Pds=Period+1;
    FastSC=2/(2+1);
    SlowSC=2/(30+1);
 
			
    source = instance.source; 
    first=source:first()+Pds;
	 
 
	AAA = instance:addStream("AAA" , core.Line, " AAA"," AAA",instance.parameters.color, first+1);
	AAA:setWidth(instance.parameters.width);
    AAA:setStyle(instance.parameters.style);
     
end

-- Indicator calculation routine
function Update(period )
 
	
	
    if period < first then
	return;
	end
	
	
	local min,max=mathex.minmax(source, period-Pds+1, period);
	local Mltp=math.abs((source.close[period]-min)-(max-source.close[period]))/(max-min);
	local SSC=Mltp*(FastSC-SlowSC)+SlowSC;
	local Constant= math.pow(SSC,2);
	
	if period<Pds+1 then
	AAA[period]=source.close[period-1]+Constant*(source.close[period]-source.close[period-1]);
	else
	AAA[period]=AAA[period-1]+Constant*(source.close[period]-AAA[period-1]);
	end
 
				  
end