-- More information about this indicator can be found at:
-- http://fxcodebase.com/code/viewtopic.php?f=17&t=21013
-- Id: 7004

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function Init()
    indicator:name("RSX_BB indicator");
    indicator:description("RSX_BB indicator");
    indicator:requiredSource(core.Tick);
    indicator:type(core.Oscillator);

    indicator.parameters:addGroup("Calculation");
    indicator.parameters:addInteger("DPeriod", "D Period", "", 15);
    indicator.parameters:addString("DMethod", "D Method", "", "MVA");
    indicator.parameters:addStringAlternative("DMethod", "MVA", "", "MVA");
    indicator.parameters:addStringAlternative("DMethod", "EMA", "", "EMA");
    indicator.parameters:addStringAlternative("DMethod", "KAMA", "", "KAMA");
    indicator.parameters:addStringAlternative("DMethod", "Wilder", "", "Wilder");
    indicator.parameters:addStringAlternative("DMethod", "LWMA", "", "LWMA");
    indicator.parameters:addStringAlternative("DMethod", "SineWMA", "", "SineWMA");
    indicator.parameters:addStringAlternative("DMethod", "TriMA", "", "TriMA");
    indicator.parameters:addStringAlternative("DMethod", "LSMA", "", "LSMA");
    indicator.parameters:addStringAlternative("DMethod", "SMMA", "", "SMMA");
    indicator.parameters:addStringAlternative("DMethod", "HMA", "", "HMA");
    indicator.parameters:addStringAlternative("DMethod", "ZeroLagEMA", "", "ZeroLagEMA");
    indicator.parameters:addStringAlternative("DMethod", "DEMA", "", "DEMA");
    indicator.parameters:addStringAlternative("DMethod", "T3", "", "T3");
    indicator.parameters:addStringAlternative("DMethod", "ITrend", "", "ITrend");
    indicator.parameters:addStringAlternative("DMethod", "Median", "", "Median");
    indicator.parameters:addStringAlternative("DMethod", "GeoMean", "", "GeoMean");
    indicator.parameters:addStringAlternative("DMethod", "REMA", "", "REMA");
    indicator.parameters:addStringAlternative("DMethod", "ILRS", "", "ILRS");
    indicator.parameters:addStringAlternative("DMethod", "IE/2", "", "IE/2");
    indicator.parameters:addStringAlternative("DMethod", "TriMAgen", "", "TriMAgen");
    indicator.parameters:addStringAlternative("DMethod", "JSmooth", "", "JSmooth");
    indicator.parameters:addString("DType", "D Type", "", "Histogram");
    indicator.parameters:addStringAlternative("DType", "Line", "", "Line");
    indicator.parameters:addStringAlternative("DType", "Histogram", "", "Histogram");
    indicator.parameters:addStringAlternative("DType", "Dots", "", "Dots");
    
    indicator.parameters:addInteger("SPeriod", "S Period", "", 15);
    indicator.parameters:addString("SMethod", "S Method", "", "MVA");
    indicator.parameters:addStringAlternative("SMethod", "MVA", "", "MVA");
    indicator.parameters:addStringAlternative("SMethod", "EMA", "", "EMA");
    indicator.parameters:addStringAlternative("SMethod", "KAMA", "", "KAMA");
    indicator.parameters:addStringAlternative("SMethod", "Wilder", "", "Wilder");
    indicator.parameters:addStringAlternative("SMethod", "LWMA", "", "LWMA");
    indicator.parameters:addStringAlternative("SMethod", "SineWMA", "", "SineWMA");
    indicator.parameters:addStringAlternative("SMethod", "TriMA", "", "TriMA");
    indicator.parameters:addStringAlternative("SMethod", "LSMA", "", "LSMA");
    indicator.parameters:addStringAlternative("SMethod", "SMMA", "", "SMMA");
    indicator.parameters:addStringAlternative("SMethod", "HMA", "", "HMA");
    indicator.parameters:addStringAlternative("SMethod", "ZeroLagEMA", "", "ZeroLagEMA");
    indicator.parameters:addStringAlternative("SMethod", "DEMA", "", "DEMA");
    indicator.parameters:addStringAlternative("SMethod", "T3", "", "T3");
    indicator.parameters:addStringAlternative("SMethod", "ITrend", "", "ITrend");
    indicator.parameters:addStringAlternative("SMethod", "Median", "", "Median");
    indicator.parameters:addStringAlternative("SMethod", "GeoMean", "", "GeoMean");
    indicator.parameters:addStringAlternative("SMethod", "REMA", "", "REMA");
    indicator.parameters:addStringAlternative("SMethod", "ILRS", "", "ILRS");
    indicator.parameters:addStringAlternative("SMethod", "IE/2", "", "IE/2");
    indicator.parameters:addStringAlternative("SMethod", "TriMAgen", "", "TriMAgen");
    indicator.parameters:addStringAlternative("SMethod", "JSmooth", "", "JSmooth");
    indicator.parameters:addInteger("BandsPeriod", "Bands Period", "", 100);
    indicator.parameters:addDouble("Deviation1", "Deviation 1", "", 1);
    indicator.parameters:addDouble("Deviation2", "Deviation 2", "", 1.6);

    indicator.parameters:addGroup("Style");
    indicator.parameters:addColor("RSX_UP_P_clr", "RSX UP Positive Color", "RSX UP Positive Color", core.rgb(0, 128, 128));
    indicator.parameters:addColor("RSX_UP_N_clr", "RSX UP Negative Color", "RSX UP Negative Color", core.rgb(255, 128, 255));
    indicator.parameters:addColor("RSX_DN_P_clr", "RSX DN Positive Color", "RSX DN Positive Color", core.rgb(0, 0, 255));
    indicator.parameters:addColor("RSX_DN_N_clr", "RSX DN Negative Color", "RSX DN Negative Color", core.rgb(255, 0, 0));
    indicator.parameters:addColor("Signal_UP_clr", "Signal UP Color", "Signal UP Color", core.rgb(0, 255, 0));
    indicator.parameters:addColor("Signal_DN_clr", "Signal DN Color", "Signal DN Color", core.rgb(255, 128, 0));
    indicator.parameters:addInteger("widthLinReg", "Line width", "Line width", 1, 1, 5);
    indicator.parameters:addInteger("styleLinReg", "Line style", "Line style", core.LINE_SOLID);
    indicator.parameters:setFlag("styleLinReg", core.FLAG_LINE_STYLE);
    indicator.parameters:addColor("Bands1_clr", "Bands 1 color", "Bands 1 color", core.rgb(255, 0, 0));
    indicator.parameters:addColor("Bands2_clr", "Bands 2 color", "Bands 2 color", core.rgb(0, 0, 255));
    indicator.parameters:addInteger("Bwidth", "Bands width", "Bands width", 1, 1, 5);
    indicator.parameters:addInteger("Bstyle", "Bands style", "Bands style", core.LINE_SOLID);
end

local first;
local source = nil;
local DPeriod;
local DMethod;
local SPeriod;
local SMethod;
local BandsPeriod;
local Deviation1;
local Deviation2;
local DPrice, AbsDPrice;
local DMA, AbsDMA, SignalMA;
local BB1, BB2;
local RSX=nil;
local Signal=nil;
local UpperBand1=nil;
local UpperBand2=nil;
local LowerBand1=nil;
local LowerBand2=nil;

function Prepare(nameOnly)
    source = instance.source;
    DPeriod=instance.parameters.DPeriod;
    DMethod=instance.parameters.DMethod;
    SPeriod=instance.parameters.SPeriod;
    SMethod=instance.parameters.SMethod;
    BandsPeriod=instance.parameters.BandsPeriod;
    Deviation1=instance.parameters.Deviation1;
    Deviation2=instance.parameters.Deviation2;
    local name = profile:id() .. "(" .. source:name() .. ", " .. instance.parameters.DPeriod .. ", " .. instance.parameters.DMethod .. ", " .. instance.parameters.SPeriod .. ", " .. instance.parameters.SMethod .. ", " .. instance.parameters.BandsPeriod .. ", " .. instance.parameters.Deviation1 .. ", " .. instance.parameters.Deviation2 .. ")";
    instance:name(name);
    if nameOnly then
        return;
    end
  
    DPrice = instance:addInternalStream(0, 0);
    AbsDPrice = instance:addInternalStream(0, 0);
	  
    assert(core.indicators:findIndicator("AVERAGES") ~= nil, "Please, download and install AVERAGES.LUA indicator");   
    DMA = core.indicators:create("AVERAGES", DPrice, DMethod, DPeriod, false);
    AbsDMA = core.indicators:create("AVERAGES", AbsDPrice, DMethod, DPeriod, false);
	first = AbsDMA.DATA:first();
	
    if instance.parameters.DType=="Line" then
     RSX = instance:addStream("RSX", core.Line, name .. ".RSX", "RSX", instance.parameters.RSX_UP_P_clr, first);
    elseif instance.parameters.DType=="Histogram" then
     RSX = instance:addStream("RSX", core.Bar, name .. ".RSX", "RSX", instance.parameters.RSX_UP_P_clr, first);
    else
     RSX = instance:addStream("RSX", core.Dot, name .. ".RSX", "RSX", instance.parameters.RSX_UP_P_clr, first);
    end 
    RSX:setPrecision(math.max(2, instance.source:getPrecision()));
    SignalMA = core.indicators:create("AVERAGES", RSX, SMethod, SPeriod, false);
    BB1 = core.indicators:create("BB", RSX, BandsPeriod, Deviation1);
    BB2 = core.indicators:create("BB", RSX, BandsPeriod, Deviation2);
    Signal = instance:addStream("Signal", core.Line, name .. ".Signal", "Signal", instance.parameters.Signal_UP_clr, first);
    Signal:setPrecision(math.max(2, instance.source:getPrecision()));
    Signal:setWidth(instance.parameters.widthLinReg);
    Signal:setStyle(instance.parameters.styleLinReg);
    RSX:addLevel(50);
    RSX:addLevel(-50);
    UpperBand1 = instance:addStream("UpperBand1", core.Line, name .. ".UpperBand1", "UpperBand1", instance.parameters.Bands1_clr, first);
    UpperBand1:setPrecision(math.max(2, instance.source:getPrecision()));
    LowerBand1 = instance:addStream("LowerBand1", core.Line, name .. ".LowerBand1", "LowerBand1", instance.parameters.Bands1_clr, first);
    LowerBand1:setPrecision(math.max(2, instance.source:getPrecision()));
    UpperBand2 = instance:addStream("UpperBand2", core.Line, name .. ".UpperBand2", "UpperBand2", instance.parameters.Bands2_clr, first);
    UpperBand2:setPrecision(math.max(2, instance.source:getPrecision()));
    LowerBand2 = instance:addStream("LowerBand2", core.Line, name .. ".LowerBand2", "LowerBand2", instance.parameters.Bands2_clr, first);
    LowerBand2:setPrecision(math.max(2, instance.source:getPrecision()));
    UpperBand1:setWidth(instance.parameters.Bwidth);
    UpperBand1:setStyle(instance.parameters.Bstyle);
    LowerBand1:setWidth(instance.parameters.Bwidth);
    LowerBand1:setStyle(instance.parameters.Bstyle);
    UpperBand2:setWidth(instance.parameters.Bwidth);
    UpperBand2:setStyle(instance.parameters.Bstyle);
    LowerBand2:setWidth(instance.parameters.Bwidth);
    LowerBand2:setStyle(instance.parameters.Bstyle);
end

function Update(period, mode)
 
    DPrice[period]=source[period]-source[period-1];
    AbsDPrice[period]=math.abs(DPrice[period]);
	
   if (period<first) then
   return;
   end
	
    DMA:update(mode);
    AbsDMA:update(mode);
    if (AbsDMA.DATA[period]==0) then
     RSX[period]=nil;
    else
     local RSX_=DMA.DATA[period]/AbsDMA.DATA[period];
     RSX_=math.max(math.min(RSX_,1),-1);
     RSX[period]=RSX_*100;
    end
    SignalMA:update(mode);
    Signal[period]=SignalMA.DATA[period];
    
    BB1:update(mode);
    BB2:update(mode);
    
    UpperBand1[period]=BB1.TL[period];
    LowerBand1[period]=BB1.BL[period];
    UpperBand2[period]=BB2.TL[period];
    LowerBand2[period]=BB2.BL[period];
    
    if RSX[period]>=0 then
     if RSX[period]>=RSX[period-1] then
      RSX:setColor(period, instance.parameters.RSX_UP_P_clr);
     else
      RSX:setColor(period, instance.parameters.RSX_DN_P_clr);
     end
    else
     if RSX[period]>=RSX[period-1] then
      RSX:setColor(period, instance.parameters.RSX_UP_N_clr);
     else
      RSX:setColor(period, instance.parameters.RSX_DN_N_clr);
     end
    end
    
    if Signal[period]>=Signal[period-1] then
     Signal:setColor(period, instance.parameters.Signal_UP_clr)
    else
     Signal:setColor(period, instance.parameters.Signal_DN_clr)
    end
  
end