-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=59373
-- Id: 9867

--+------------------------------------------------------------------+
--|                               Copyright © 2018, Gehtsoft USA LLC |
--|                                            http://fxcodebase.com |
--+------------------------------------------------------------------+
--|                                      Developed by : Mario Jemic  |
--|                                          mario.jemic@gmail.com   |
--+------------------------------------------------------------------+
--|                                 Support our efforts by donating  |
--|                                  Paypal : https://goo.gl/9Rj74e  |
--|                                 Patreon : https://goo.gl/GdXWeN  |
--|                    BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF  |
--|               BitCoin Cash : 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg  |
--|           Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D  |
--|                   LiteCoin : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD  |
--+------------------------------------------------------------------+

function Init()
    indicator:name("Min Max Volume");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Indicator);
	
	indicator.parameters:addGroup("Calculation");	
	indicator.parameters:addInteger("Period", "Period", "", 20);
	
	indicator.parameters:addGroup("Style");
	indicator.parameters:addInteger("Size", "Arriw Size", "", 10);
	indicator.parameters:addColor("Up", "Max color", "", core.rgb(0, 255, 0));
	indicator.parameters:addColor("Dn", "Min color", "", 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 first;
local source = nil;
local Size;
local Type;
local up, down; 
local Period;
function Prepare(nameOnly)
    Period=instance.parameters.Period;
	Size=instance.parameters.Size;	 
	source = instance.source;
	   
    local name = profile:id() .. "(" .. source:name() .. ", "..source:barSize() .. ", "..Period;
	instance:name(name);	
	if nameOnly then
		return;
	end
	up = instance:createTextOutput ("Up", "Up", "Wingdings", Size, core.H_Center, core.V_Top, instance.parameters.Up, 0);
    down = instance:createTextOutput ("Dn", "Dn", "Wingdings", Size, core.H_Center, core.V_Bottom, instance.parameters.Dn, 0);
	
	first= source:first()+Period;
		
end

-- Indicator calculation routine
function Update(period)

	
			if period < first then
			return;
			end
			
			up:setNoData(period);
            down:setNoData(period);
			
	      local min,max;
		  
		  min,max=mathex.minmax(source.volume, period-Period+1, period);
		 
		                        if source.volume[period]== max then
								up:set(period, source.high[period], "\108",source.volume[period]);
							    end
							    if source.volume[period]== min  then
								down:set(period, source.low[period], "\108", source.volume[period]);
								end
		 
 end