-- Id: 5452
-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=10551

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function Init()
    indicator:name("CMO with MA indicator");
    indicator:description("CMO with MA indicator");
    indicator:requiredSource(core.Tick);
    indicator:type(core.Oscillator);

    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addInteger("Period", "Period", "", 14);
    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:addGroup("Style");
    indicator.parameters:addColor("UPclr", "UP Color", "UP Color", core.rgb(0, 255, 0));
    indicator.parameters:addColor("DNclr", "DN Color", "DN Color", core.rgb(255, 0, 0));
end

local first;
local source = nil;
local Period;
local Method;
local MA;
local CMO_MA=nil;
local Bulls;
local Bears;

function Prepare(nameOnly)
    source = instance.source;
    Period=instance.parameters.Period;
 
    local name = profile:id() .. "(" .. source:name() .. ", " .. instance.parameters.Period .. ", " .. instance.parameters.Method .. ")";
    instance:name(name);
    if nameOnly then
        return;
    end
    Bulls=instance:addInternalStream(0, 0);
    Bears=instance:addInternalStream(0, 0);
	assert(core.indicators:findIndicator("AVERAGES") ~= nil, "Please, download and install AVERAGES.LUA indicator");    
    MA = core.indicators:create("AVERAGES", source, Method, Period, false);
	first = MA.DATA:first();
    CMO_MA = instance:addStream("CMO_MA", core.Bar, name .. ".CMO_MA", "CMO_MA", instance.parameters.UPclr, first);
	
	CMO_MA:setPrecision(math.max(2, instance.source:getPrecision()));
end

function Update(period, mode)
   if (period>first) then
    MA:update(mode);
    local dPrice=MA.DATA[period]-MA.DATA[period-1];
    Bulls[period]=0.5*(math.abs(dPrice)+dPrice);
    Bears[period]=0.5*(math.abs(dPrice)-dPrice);
    local SumBulls=mathex.sum(Bulls,core.rangeTo(period,Period));
    local SumBears=mathex.sum(Bears,core.rangeTo(period,Period));
    CMO_MA[period]=100*(SumBulls-SumBears)/(SumBulls+SumBears);
    if CMO_MA[period]>0 then
     CMO_MA:setColor(period,instance.parameters.UPclr);
    else
     CMO_MA:setColor(period,instance.parameters.DNclr);
    end
   end 
end