-- More information about this indicator can be found at:
-- https://fxcodebase.com/code/viewtopic.php?f=17&t=72378

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-- Indicator profile initialization routine
-- Defines indicator profile properties and indicator parameters
-- TODO: Add minimal and maximal value of numeric parameters and default color of the streams
function Init()
    indicator:name("RSI Peak and Bottom");
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator);

  
 	indicator.parameters:addGroup("Calculation");	
    indicator.parameters:addInteger("PeriodRSI", "Period", "", 14, 1, 2000);
	
	 indicator.parameters:addGroup("Line Style");	
    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);
	
	 indicator.parameters:addColor("color", "Line Color", "", core.rgb(0, 0, 255)); 
	 
	indicator.parameters:addGroup("Arrow Style");	
	indicator.parameters:addInteger("Size", "Arrow Size", "", 20); 
   indicator.parameters:addColor("clrUP", "Up Arrow", "" ,  core.COLOR_UPCANDLE);
    indicator.parameters:addColor("clrDN",  "Down Arrow", "" , core.COLOR_DOWNCANDLE);		 

    indicator.parameters:addGroup("Levels");	
    indicator.parameters:addDouble("Level1", "1. Level","", 30);
	indicator.parameters:addDouble("Level2", "2. Level","", 50);
	indicator.parameters:addDouble("Level3", "3. Level","", 70); 
	indicator.parameters:addColor("level_overboughtsold_color", "Line Color","", core.rgb(128, 128, 128));
    indicator.parameters:addInteger("level_overboughtsold_width","Line width","", 1, 1, 5);
    indicator.parameters:addInteger("level_overboughtsold_style", "Line Style","", core.LINE_SOLID);
    indicator.parameters:setFlag("level_overboughtsold_style", core.FLAG_LEVEL_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
-- Parameters block
 
	
local first;
local source = nil;
local PeriodRSI; 
local Indicator;
	
-- Routine
 function Prepare(nameOnly)   
 
    
	PeriodRSI=instance.parameters.PeriodRSI;
	source = instance.source
 
    local name = profile:id() .. "(" ..  instance.source:name().. "," ..  PeriodRSI  .. ")";
    instance:name(name); 


    if   (nameOnly) then
        return;
    end
	
	Indicator= core.indicators:create("RSI", source.close, PeriodRSI);
	first=Indicator.DATA:first()+4 ; 
	
	
 
 
	
	
    Line = instance:addStream("Line", core.Line, name, "Line", instance.parameters.color, first );
    Line:setPrecision(math.max(2, instance.source:getPrecision()));
    Line:setWidth(instance.parameters.width);
    Line:setStyle(instance.parameters.style);
    Line:addLevel(0);	

	
	up = instance:createTextOutput ("Up", "Up", "Wingdings", instance.parameters.Size, core.H_Center, core.V_Bottom, instance.parameters.clrUP, 0);
    down = instance:createTextOutput ("Dn", "Dn", "Wingdings", instance.parameters.Size, core.H_Center, core.V_Top, instance.parameters.clrDN, 0);
 
	Up = instance:createTextOutput ("UP", "UP", "Wingdings", instance.parameters.Size, core.H_Center, core.V_Bottom, instance.parameters.clrUP, 0);
    Down = instance:createTextOutput ("DN", "DN", "Wingdings", instance.parameters.Size, core.H_Center, core.V_Top, instance.parameters.clrDN, 0); 


    core.host:execute ("attachTextToChart", "UP");
    core.host:execute ("attachTextToChart", "DN");
	
	Line:addLevel(instance.parameters.Level1, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);
	Line:addLevel(instance.parameters.Level2, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);
	Line:addLevel(instance.parameters.Level3, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);
			
end


function Update(period, mode)

	Indicator:update(mode); 
    
	if period <= first then
	return;
	end


    up:setNoData(period);
    down:setNoData(period);	
	
	Line[period]= Indicator.DATA[period];
	
	local rsi1= Indicator.DATA[period-1];
	local rsi2= Indicator.DATA[period-2];
	local rsi3= Indicator.DATA[period-3];
	local rsi4= Indicator.DATA[period-4];
	
	if  ((rsi1<rsi2 and rsi2>rsi3) or (rsi1<rsi2 and rsi2==rsi3 and rsi3>rsi4)) then
    down:set(period, Line[period], "\218", Line[period]);  
    Down:set(period, source.high[period], "\218", source.high[period]);  	
    end
    
	if  ((rsi1>rsi2 and rsi2<rsi3) or (rsi1>rsi2 and rsi2==rsi3 and rsi3<rsi4))  then             
    up:set(period, Line[period], "\217", Line[period]);	    
    Up:set(period, source.low[period], "\217", source.low[period]);	   	
	end		
			

	
end