-- Id: 7212

-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=22756

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function Init()
    indicator:name("Adaptable Stochastic RSI");
    indicator:description("");
    indicator:requiredSource(core.Tick);
    indicator:type(core.Oscillator);
 
   indicator.parameters:addGroup("Calculation");
    indicator.parameters:addInteger("N", "Number of periods for RSI", "", 14, 1, 200);
    indicator.parameters:addInteger("K", "%K Stochastic Periods", "", 14, 1, 200);
	
    indicator.parameters:addGroup("K Line Smoothing  Calculation");
    indicator.parameters:addInteger("N1", "Number of periods to smooth", "", 8, 1, 10000);
    indicator.parameters:addString("Method1" , "Method for avegage", "", "EMA");
	indicator.parameters:addStringAlternative("Method1", "EMA", "", "EMA");
    indicator.parameters:addStringAlternative("Method1" , "MVA", "", "MVA");  
    indicator.parameters:addStringAlternative("Method1" , "LWMA", "", "LWMA");	
	indicator.parameters:addStringAlternative("Method1" , "KAMA", "", "KAMA");	
	indicator.parameters:addStringAlternative("Method1" , "SMMA", "", "SMMA");	
	indicator.parameters:addStringAlternative("Method1" , "TMA", "", "TMA");	
	indicator.parameters:addStringAlternative("Method1" , "VIDYA", "", "VIDYA");	
	indicator.parameters:addStringAlternative("Method1" , "WMA", "", "WMA");	
	
	 indicator.parameters:addGroup("D Line Smoothing   Calculation");
    indicator.parameters:addInteger("N2", "Number of periods to smooth", "", 8, 1, 10000);
	indicator.parameters:addString("Method2" , "Method for avegage", "", "EMA");
	indicator.parameters:addStringAlternative("Method2", "EMA", "", "EMA");
    indicator.parameters:addStringAlternative("Method2" , "MVA", "", "MVA");  
    indicator.parameters:addStringAlternative("Method2" , "LWMA", "", "LWMA");	
	indicator.parameters:addStringAlternative("Method2" , "KAMA", "", "KAMA");	
	indicator.parameters:addStringAlternative("Method2" , "SMMA", "", "SMMA");	
	indicator.parameters:addStringAlternative("Method2" , "TMA", "", "TMA");	
	indicator.parameters:addStringAlternative("Method2" , "VIDYA", "", "VIDYA");	
	indicator.parameters:addStringAlternative("Method2" , "WMA", "", "WMA");	

	
   	indicator.parameters:addGroup("K Line Style");
	 indicator.parameters:addColor("K_color", "Color of K", "Color of K", core.rgb(0, 255, 0));
	 indicator.parameters:addInteger("K_width", "Width", "Width", 1, 1, 5);
    indicator.parameters:addInteger("K_style", "Style", "Style", core.LINE_SOLID);
    indicator.parameters:setFlag("K_style", core.FLAG_LINE_STYLE);
	indicator.parameters:addGroup("D Line Style");
    indicator.parameters:addColor("D_color", "Color of D", "Color of D", core.rgb(255, 0, 0));
	 indicator.parameters:addInteger("D_width", "Width", "Width", 1, 1, 5);
    indicator.parameters:addInteger("D_style", "Style", "Style", core.LINE_SOLID);
    indicator.parameters:setFlag("D_style", core.FLAG_LINE_STYLE);
end

-- Indicator instance initialization routine

-- Parameters block
local N;
local K;
local KS;
local D;

local firstSKI;
local firstK;
local firstD;
local source = nil;

-- Streams block
local SKI = nil;
local SK = nil;
local SD = nil;
local RSI = nil;
local MVA1 = nil;
local MVA2 = nil;
local N1, N2, P1,P2,Method1, Method2;
-- Routine
function Prepare(nameOnly)
    K = instance.parameters.K;
    N = instance.parameters.N;
    N1= instance.parameters.N1;
	P1= instance.parameters.P1;
	N2= instance.parameters.N2;
	P2= instance.parameters.P2;
	Method2= instance.parameters.Method2;
	Method1= instance.parameters.Method1;

    source = instance.source;
    first = source:first();

    local name = profile:id() .. "(" .. source:name() .. ", " .. N .. ", " .. K .. ", " .. N1.. ", " .. Method1 .. ", " .. N2 ..", " .. Method2.. ")";
    instance:name(name);
    if nameOnly then
        return;
    end
    RSI = core.indicators:create("RSI", source, N);
    firstSKI = RSI.DATA:first() + K;
    SKI = instance:addInternalStream(firstSKI, 0);
	
	
    assert(core.indicators:findIndicator(Method1) ~= nil, Method1 .. " indicator must be installed");
    MVA1 = core.indicators:create(Method1, SKI,  N1  );
    firstK = MVA1.DATA:first();
    SK = instance:addStream("K", core.Line, name .. ".K", "K", instance.parameters.K_color, firstK);
    SK:setPrecision(math.max(2, instance.source:getPrecision()));
	SK:setWidth(instance.parameters.K_width);
    SK:setStyle(instance.parameters.K_style);
    SK:addLevel(20);
    SK:addLevel(50);
    SK:addLevel(80);
    MVA2 = core.indicators:create(Method1, SK,  N2 );
    firstD = MVA2.DATA:first();
    SD = instance:addStream("D", core.Line, name .. ".D", "D", instance.parameters.D_color, firstD);
    SD:setPrecision(math.max(2, instance.source:getPrecision()));
	SD:setWidth(instance.parameters.D_width);
    SD:setStyle(instance.parameters.D_style);
end

-- Indicator calculation routine
function Update(period, mode)
    RSI:update(mode);

    if (period >= firstSKI) then
        local min, max;
        local range;
        range = core.rangeTo(period, K);
        min = core.min(RSI.DATA, range);
        max = core.max(RSI.DATA, range);
        if (min == max) then
            SKI[period] = 100;
        else
            SKI[period] = (RSI.DATA[period] - min) / (max - min) * 100;
        end
    end

    MVA1:update(mode);

    if period >= firstK then
        SK[period] = MVA1.DATA[period];
    end

    MVA2:update(mode);

    if (period >= firstD) then
        SD[period] = MVA2.DATA[period];
    end
end