--+------------------------------------------------------------------+ --| Copyright © 2018, Gehtsoft USA LLC | --| http://fxcodebase.com | --+------------------------------------------------------------------+ --| Developed by : Mario Jemic | --| mario.jemic@gmail.com | --+------------------------------------------------------------------+ --| Support our efforts by donating | --| Paypal: https://goo.gl/9Rj74e | --+------------------------------------------------------------------+ --| Patreon : https://goo.gl/GdXWeN | --| BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF | --| BitCoin Cash: 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg | --| Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D | --| LiteCoin : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD | --+------------------------------------------------------------------+ -- Available @ http://fxcodebase.com/code/viewtopic.php?f=17&t=61991 -- The indicator corresponds to the Larry Williams' Percent Range indicator in MetaTrader. -- The formula is described in the Kaufman "Trading Systems and Methods" chapter 6 "Momentum and Oscillators" (page 143) -- Indicator profile initialization routine -- Defines indicator profile properties and indicator parameters function Init() indicator:name("Tick RLW"); indicator:description(""); indicator:requiredSource(core.Tick); indicator:type(core.Oscillator); indicator:setTag("group", "Classic Oscillators"); indicator.parameters:addGroup("Calculation"); indicator.parameters:addInteger("N", "Period","", 14, 2, 1000); indicator.parameters:addGroup("Style"); indicator.parameters:addColor("clrRLW", "Color","", core.rgb(255, 0, 0)); indicator.parameters:addInteger("widthRLW", "Width","" , 1, 1, 5); indicator.parameters:addInteger("styleRLW", "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","Width","", 1, 1, 5); indicator.parameters:addInteger("level_overboughtsold_style","Style","", core.LINE_SOLID); indicator.parameters:addColor("level_overboughtsold_color","Color","", core.rgb(255, 255, 0)); indicator.parameters:setFlag("level_overboughtsold_style", core.FLAG_LEVEL_STYLE); end -- Indicator instance initialization routine -- Processes indicator parameters and creates output streams -- Parameters block local n; local first; local source = nil; -- Streams block local RLW = nil; -- Routine function Prepare(nameOnly) n = instance.parameters.N; source = instance.source; first = source:first() + n - 1; local name = profile:id() .. "(" .. source:name() .. ", " .. n .. ")"; instance:name(name); if (nameOnly) then return; end 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 -- Indicator calculation routine function Update(period) if period >= first then 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 end