-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=2617

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function Init()
    indicator:name("Advanced fractal on MA");
    indicator:description("Advanced fractal on MA");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);

    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addString("Method", "Method", "", "MVA");
    indicator.parameters:addStringAlternative("Method", "MVA", "", "MVA");
    indicator.parameters:addStringAlternative("Method", "EMA", "", "EMA");
    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:addInteger("Period", "Period", "", 20);
    
    indicator.parameters:addString("up_price", "up_price", "", "high");
    indicator.parameters:addStringAlternative("up_price", "close", "", "close");
    indicator.parameters:addStringAlternative("up_price", "open", "", "open");
    indicator.parameters:addStringAlternative("up_price", "high", "", "high");
    indicator.parameters:addStringAlternative("up_price", "low", "", "low");
    indicator.parameters:addStringAlternative("up_price", "median", "", "median");
    indicator.parameters:addStringAlternative("up_price", "typical", "", "typical");
    indicator.parameters:addStringAlternative("up_price", "weighted", "", "weighted");
    
    indicator.parameters:addString("dn_price", "dn_price", "", "low");
    indicator.parameters:addStringAlternative("dn_price", "close", "", "close");
    indicator.parameters:addStringAlternative("dn_price", "open", "", "open");
    indicator.parameters:addStringAlternative("dn_price", "high", "", "high");
    indicator.parameters:addStringAlternative("dn_price", "low", "", "low");
    indicator.parameters:addStringAlternative("dn_price", "median", "", "median");
    indicator.parameters:addStringAlternative("dn_price", "typical", "", "typical");
    indicator.parameters:addStringAlternative("dn_price", "weighted", "", "weighted");
    
    indicator.parameters:addInteger("Frame", "Number of fractals (Odd)", "Number of fractals (Odd)", 5, 5,99);

    indicator.parameters:addGroup("Style");
    indicator.parameters:addColor("UP", "Up fractal color", "Up fractal color", core.rgb(0,255,0));
    indicator.parameters:addColor("DOWN", "Down fractal color", "Down fractal color", core.rgb(255,0,0));
end

local first;
local source = nil;
local Method;
local Period;
local Frame;
local up_price;
local dn_price;
local MA_up;
local MA_dn;
local up;
local down;

function Prepare(nameOnly)
    source = instance.source;
    Method=instance.parameters.Method;
    Period=instance.parameters.Period;
    Frame=instance.parameters.Frame;
    up_price=instance.parameters.up_price;
    dn_price=instance.parameters.dn_price;
	
	assert(core.indicators:findIndicator("AVERAGES") ~= nil, "Please, download and install AVERAGES.LUA indicator");
	
    local name = profile:id() .. "(" .. source:name() .. ", " .. instance.parameters.Method .. ", " .. instance.parameters.Period .. ", " .. instance.parameters.Frame .. ", " .. instance.parameters.up_price .. ", " .. instance.parameters.dn_price .. ")";
    instance:name(name);
    if nameOnly then
        return;
    end
    if up_price=="close" then
     MA_up = core.indicators:create("AVERAGES", source.close,  Method, Period, false);
    elseif up_price=="open" then
     MA_up = core.indicators:create("AVERAGES", source.open,  Method, Period, false);
    elseif up_price=="high" then
     MA_up = core.indicators:create("AVERAGES", source.high,  Method, Period, false);
    elseif up_price=="low" then
     MA_up = core.indicators:create("AVERAGES", source.low,  Method, Period, false);
    elseif up_price=="median" then
     MA_up = core.indicators:create("AVERAGES", source.median,  Method, Period, false);
    elseif up_price=="typical" then
     MA_up = core.indicators:create("AVERAGES", source.typical,  Method, Period, false);
    else
     MA_up = core.indicators:create("AVERAGES", source.weighted,  Method, Period, false);
    end 
    if dn_price=="close" then
     MA_dn = core.indicators:create("AVERAGES", source.close,  Method, Period, false);
    elseif dn_price=="open" then
     MA_dn = core.indicators:create("AVERAGES", source.open,  Method, Period, false);
    elseif dn_price=="high" then
     MA_dn = core.indicators:create("AVERAGES", source.high,  Method, Period, false);
    elseif dn_price=="low" then
     MA_dn = core.indicators:create("AVERAGES", source.low,  Method, Period, false);
    elseif dn_price=="median" then
     MA_dn = core.indicators:create("AVERAGES", source.median,  Method, Period, false);
    elseif dn_price=="typical" then
     MA_dn = core.indicators:create("AVERAGES", source.typical,  Method, Period, false);
    else
     MA_dn = core.indicators:create("AVERAGES", source.weighted,  Method, Period, false);
    end 
    first = MA_up.DATA:first()+2;
    up = instance:createTextOutput ("Up", "Up", "Wingdings", 10, core.H_Center, core.V_Top, instance.parameters.UP, 0);
    down = instance:createTextOutput ("Dn", "Dn", "Wingdings", 10, core.H_Center, core.V_Bottom, instance.parameters.DOWN, 0);
end

function Update(period, mode)

    up:setNoData (period);
	down:setNoData (period);
   if (period>first+math.floor((Frame-1)/2) and period<source:size()-math.floor((Frame-1)/2)) then
    MA_up:update(mode);
    MA_dn:update(mode);
    local Fl_UP=true;
    local Fl_DN=true;
    local i;
    for i=1,math.floor((Frame-1)/2),1 do
     if MA_dn.DATA[period-i]<=MA_dn.DATA[period] or MA_dn.DATA[period+i]<=MA_dn.DATA[period] then
      Fl_DN=false;
     end
     if MA_up.DATA[period-i]>=MA_up.DATA[period] or MA_up.DATA[period+i]>=MA_up.DATA[period] then
      Fl_UP=false;
     end
    end
    if Fl_UP==true then
     up:set(period, source.high[period], "\226");
    end
    if Fl_DN==true then
     down:set(period, source.low[period], "\225");
    end
   end 
end