-- More information about this indicator can be found at: -- http://fxcodebase.com/code/viewtopic.php?f=17&t=412 --+------------------------------------------------------------------+ --| Copyright © 2018, Gehtsoft USA LLC | --| http://fxcodebase.com | --+------------------------------------------------------------------+ --| Support our efforts by donating | --| Paypal: https://goo.gl/9Rj74e | --| BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF | --| BitCoin Cash: 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg | --| Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D | --| LiteCoin : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD | --+------------------------------------------------------------------+ function Init() indicator:name("Guppy's Multiple Moving Average"); indicator:requiredSource(core.Tick); indicator:type(core.Indicator); local i; indicator.parameters:addGroup("Style "); for i =1, 12, 1 do indicator.parameters:addInteger("widtd"..i, "Line ".. i.. ". Width", "", 1, 1, 5); indicator.parameters:addInteger("style"..i, "Line "..i..". Style", "", core.LINE_SOLID); indicator.parameters:setFlag("style"..i, core.FLAG_LINE_STYLE); end indicator.parameters:addColor("S_COLOR", "Color for the short EMA group", "", core.rgb(0, 0, 255)); indicator.parameters:addColor("L_COLOR", "Color for the long EMA group", "", core.rgb(255, 0, 0)); end local source = nil; local EMAs = {}; -- an array of outputs function CreateEMA(index, N, color, name, width,style) local label; -- line label label = "EMA" .. N; -- create the line EMAs[index] = instance:addStream(label, core.Line, name .. label, label, color, source:first() + N - 1); EMAs[index]:setWidth(width); EMAs[index]:setStyle(style); end function Prepare(nameOnly) source = instance.source; local name; -- set the indicator name (use the short name of our indicator: GMMA) name = profile:id() .. "(" .. source:name() .. ")"; instance:name(name); if (nameOnly) then return; end CreateEMA(0, 3, instance.parameters.S_COLOR, name,instance.parameters:getInteger("widtd" .. 1),instance.parameters:getInteger("style" .. 1)); CreateEMA(1, 5, instance.parameters.S_COLOR, name,instance.parameters:getInteger("widtd" .. 2),instance.parameters:getInteger("style" .. 2)); CreateEMA(2, 8, instance.parameters.S_COLOR, name,instance.parameters:getInteger("widtd" .. 3),instance.parameters:getInteger("style" .. 3)); CreateEMA(3, 10, instance.parameters.S_COLOR, name,instance.parameters:getInteger("widtd" .. 4 ),instance.parameters:getInteger("style" .. 4)); CreateEMA(4, 12, instance.parameters.S_COLOR, name,instance.parameters:getInteger("widtd" .. 5 ),instance.parameters:getInteger("style" .. 5)); CreateEMA(5, 15, instance.parameters.S_COLOR, name,instance.parameters:getInteger("widtd" .. 6 ),instance.parameters:getInteger("style" .. 6)); CreateEMA(6, 30, instance.parameters.L_COLOR, name,instance.parameters:getInteger("widtd" .. 7),instance.parameters:getInteger("style" .. 7)); CreateEMA(7, 35, instance.parameters.L_COLOR, name,instance.parameters:getInteger("widtd" .. 8 ),instance.parameters:getInteger("style" .. 8)); CreateEMA(8, 40, instance.parameters.L_COLOR, name,instance.parameters:getInteger("widtd" .. 9),instance.parameters:getInteger("style" .. 9)); CreateEMA(9, 45, instance.parameters.L_COLOR, name,instance.parameters:getInteger("widtd" .. 10),instance.parameters:getInteger("style" .. 10)); CreateEMA(10, 50, instance.parameters.L_COLOR, name,instance.parameters:getInteger("widtd" .. 11),instance.parameters:getInteger("style" .. 11)); CreateEMA(11, 60, instance.parameters.L_COLOR, name,instance.parameters:getInteger("widtd" .. 12 ),instance.parameters:getInteger("style" .. 12)); end function CalcEMA(index, N, period) local first; first = source:first() + N - 1; if period < first then return ; elseif period == first then -- range: period - N + 1, period - N + 2, ..., period local range = core.rangeTo(period, N); EMAs[index][period] = core.avg(source, range); else local k; k = 2.0 / (N + 1.0); -- EMA - PRICE * K - PREV EMA * (1 - K) EMAs[index][period] = source[period] * k + EMAs[index][period - 1] * (1 - k); end end function Update(period) CalcEMA(0, 3, period); CalcEMA(1, 5, period); CalcEMA(2, 8, period); CalcEMA(3, 10, period); CalcEMA(4, 12, period); CalcEMA(5, 15, period); CalcEMA(6, 30, period); CalcEMA(7, 35, period); CalcEMA(8, 40, period); CalcEMA(9, 45, period); CalcEMA(10, 50, period); CalcEMA(11, 60, period); end