-- Available @ https://fxcodebase.com/code/viewtopic.php?f=17&t=73532

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--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                                       https://mario-jemic.com/ |
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-- Indicator profile initialization routine
-- Defines indicator profile properties and indicator parameters
function Init()
    indicator:name("Tick RLW" );
    indicator:description("");
    indicator:requiredSource(core.Bar);
    indicator:type(core.Oscillator); 

    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addInteger("N", "Period","", 14, 2, 1000);
    indicator.parameters:addGroup("Style");
    indicator.parameters:addColor("clrRLW", "Line Color","", core.rgb(255, 0, 0));
    indicator.parameters:addInteger("widthRLW", "Line Width","", 1, 1, 5);
    indicator.parameters:addInteger("styleRLW", "Line Style","", core.LINE_SOLID);
    indicator.parameters:setFlag("styleRLW", core.FLAG_LEVEL_STYLE);

    indicator.parameters:addGroup("Levels");
    -- Overbought/oversold level
    indicator.parameters:addInteger("overbought", "OB Level","", -20, -100, 0);
    indicator.parameters:addInteger("oversold", "OS Level", "", -80, -100, 0);
    indicator.parameters:addInteger("level_overboughtsold_width", "OB/OS Line width","", 1, 1, 5);
    indicator.parameters:addInteger("level_overboughtsold_style", "OB/OS Line style","", core.LINE_SOLID);
    indicator.parameters:setFlag("level_overboughtsold_style", core.FLAG_LEVEL_STYLE);	
    indicator.parameters:addColor("level_overboughtsold_color", "Line Color","", core.rgb(255, 255, 0));

end

-- Indicator instance initialization routine
-- Processes indicator parameters and creates output streams
-- Parameters block
local n;

local first;
local source = nil;

if ffi then 
    local ffi_source;
    local ffi_RLW;
    local ffi_close;
end


-- Streams block
local RLW = nil;

-- Routine
function Prepare()
 

    n = instance.parameters.N;
    source = instance.source;
    first = source:first() + n - 1;

    local name = profile:id() .. "(" .. source:name() .. ", " .. n .. ")";
    instance:name(name);
    RLW = instance:addStream("RLW", core.Line, name, "%R", instance.parameters.clrRLW, first)
    RLW:setWidth(instance.parameters.widthRLW);
    RLW:setStyle(instance.parameters.styleRLW);
    RLW:setPrecision(2);

    RLW:addLevel(0);
    RLW:addLevel(instance.parameters.overbought, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);
    RLW:addLevel(instance.parameters.oversold, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color);
    RLW:addLevel(-100);
 
end
 
 
function Update(period)
    if period <= first then
	return;
	end
	
        local from = period - n + 1;
        low, high = mathex.minmax(source, from, period);
        local diff = high - low;
        if (diff == 0) then
            RLW[period] = 0;
        else
            RLW[period] = (-100) * (high - source[period]) / diff;
        end
    
end

 
--+------------------------------------------------------------------------------------------------+
--|                                                                    We appreciate your support. | 
--+------------------------------------------------------------------------------------------------+
--|                                                               Paypal: https://goo.gl/9Rj74e    |
--|                                                             Patreon :  https://goo.gl/GdXWeN   |  
--+------------------------------------------------------------------------------------------------+
--|                                                                   Developed by : Mario Jemic   |                    
--|                                                                       mario.jemic@gmail.com    |
--|                                                        https://AppliedMachineLearning.systems  |
--|                                                                       https://mario-jemic.com/ |
--+------------------------------------------------------------------------------------------------+

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