-- Id: 13230
-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=39870

--+------------------------------------------------------------------+
--|                               Copyright © 2018, Gehtsoft USA LLC |
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |
--|                                          mario.jemic@gmail.com   |
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--+------------------------------------------------------------------+

function Init()
    indicator:name("Sub Candle Pivot Points");
    indicator:description("Sub Candle Pivot Points");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
	
	indicator.parameters:addString("Type" , "Type", "", "1/2");
	indicator.parameters:addStringAlternative("Type" , "1/2", "1/2" , "1/2");
	indicator.parameters:addStringAlternative("Type" , "1/4", "1/4" , "1/4");

	indicator.parameters:addString("TF" , "Time frame", "", "Chart");
	indicator.parameters:addStringAlternative("TF" , "Chart Time Frame", "Chart Time Frame" , "Chart");
	indicator.parameters:addStringAlternative("TF" , "m1", "" , "m1");
	indicator.parameters:addStringAlternative("TF" , "m5", "" , "m5");
	indicator.parameters:addStringAlternative("TF" , "m15", "" , "m15");
	indicator.parameters:addStringAlternative("TF" , "m30", "" , "m30");
	indicator.parameters:addStringAlternative("TF" , "H1", "" , "H1");
    indicator.parameters:addStringAlternative("TF" , "H2", "" , "H2");
	indicator.parameters:addStringAlternative("TF" , "H3", "" , "H3");
	indicator.parameters:addStringAlternative("TF" , "H4", "" , "H4");
	indicator.parameters:addStringAlternative("TF" , "H6", "" , "H6");
	indicator.parameters:addStringAlternative("TF" , "H8", "" , "H8");
	indicator.parameters:addStringAlternative("TF" , "D1", "" , "D1");
	indicator.parameters:addStringAlternative("TF" , "W1", "" , "W1");
	indicator.parameters:addStringAlternative("TF" , "M1", "" , "M1");
	
	
	
    indicator.parameters:addGroup("Style");	
    indicator.parameters:addColor("color", "Dot Color", "Dot Color", core.rgb(0, 0, 255));
	indicator.parameters:addInteger("width", "Line width", "", 1, 1, 5);
    indicator.parameters:addInteger("style", "Line style", "", core.LINE_SOLID);
    indicator.parameters:setFlag("style", core.FLAG_LINE_STYLE);
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
 
 
local Type;
local first;
local source = nil;
local TF;
local Source, Loading; 
	local offset;
	local weekoffset;
	local color;
local style, width;
	
-- Routine
function Prepare(nameOnly)
   TF = instance.parameters.TF;
   Type = instance.parameters.Type;
   offset = core.host:execute("getTradingDayOffset");
   color = instance.parameters.color;
    weekoffset = core.host:execute("getTradingWeekOffset");
	width = instance.parameters.width;
	style = instance.parameters.style;
	   
    source = instance.source;
    first = source:first();
	
	if  TF ==  "Chart"  then
	TF= source:barSize();
	end
	
	
	 local s,e, s1, s2; 
            s, e = core.getcandle(source:barSize(), core.now(), 0, 0);
            s1, e1 = core.getcandle(TF, core.now(), 0, 0);
			
    assert ((e - s) <= (e1 - s1), "The chosen time frame must be equal to or bigger than the chart time frame!");			
			

    local name = profile:id() .. "(" .. source:name() .. ", " .. TF  .. ")";
	instance:name(name);
	if nameOnly then
		return;
	end
	
	if TF ~= source:barSize() then
	Source = core.host:execute("getSyncHistory", source:instrument(), TF, source:isBid(), 0 , 2 , 1);
	Loading = true;  
    else
	Source= source;
	Loading = false;  
	end
	
    instance:ownerDrawn(true);

end

-- Indicator calculation routine
-- TODO: Add your code for calculation output values
function Update(period)


end

local init = false;
 
function Draw(stage, context)
    if stage ~= 2 then
	return;
	end
	
        if not init then
            context:createPen (1, context:convertPenStyle (style), context:pointsToPixels (width), color)
            init = true;
        end

	local First = Initialization(math.max(context:firstBar (),source:first()));
	local Last = Initialization(math.min(context:lastBar (),source:size()-1));
	
	if not First or not Last then
    return;
    end	

 
	for period= First, Last, 1 do  
 
		Level(context, Source.high[period],period);
	    Level(context, Source.low[period],period);
		
		if Type ==  "1/4" then
		Level(context, Source.low[period]+(Source.high[period]-Source.low[period])*(1/2),period)
		Level(context, Source.low[period]+(Source.high[period]-Source.low[period])*(3/4),period)
		Level(context, Source.low[period]+(Source.high[period]-Source.low[period])*(1/4),period)
		else
		Level(context, Source.low[period]+(Source.high[period]-Source.low[period])*(1/3),period)
		Level(context, Source.low[period]+(Source.high[period]-Source.low[period])*(2/3),period)
		end 
		
	end
	
end

function Level (context,price,period)


    visible, y  = context:pointOfPrice (price );	
	
	
    mid= core.findDate (source, Source:date(period), false)
   
	
    if   mid~=  -1 then
	  x1, o, o = context:positionOfBar (mid)
	end
	
	if period < Source:size()-1 then
    mid= core.findDate (source, Source:date(period+1), false)
	else
	mid= core.findDate (source, source:date(source:size()-1), false)
	end
	  
	
     if   mid~=  -1 then
	  x2, o, o = context:positionOfBar (mid)
	end
	
	context:drawLine (1, x1, y, x2, y, 0)
end

function   Initialization(period)


   if  TF == source:barSize()  then
   return period;
   end

    local Candle;
    Candle = core.getcandle(TF, source:date(period), offset, weekoffset);

  
    if Loading or Source:size() == 0 then
        return false ;
    end

    
    if period < source:first() then
        return false;
    end

    local p = core.findDate(Source , Candle, false);

    -- candle is not found
    if p < 0 then
        return false;
	else return p;	
    end
	
end	



function AsyncOperationFinished(cookie)
    
			  if cookie == 1 then
			  Loading  = true;
		      elseif  cookie == 2 then
			  Loading  = false;            
			  instance:updateFrom(0);			  
			  end
		      
        
    return 0;
end