-- More information about this indicator can be found at: -- http://fxcodebase.com/code/viewtopic.php?f=17&t=67264 --+------------------------------------------------------------------+ --| Copyright © 2019, 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 | --+------------------------------------------------------------------+ -- Indicator profile initialization routine function Init() indicator:name("Sell Relative Strength Index"); indicator:description(""); indicator:requiredSource(core.Bar); indicator:type(core.Oscillator); indicator.parameters:addGroup("Calculation"); indicator.parameters:addInteger("Length", "Length", "", 20, 1, 2000); indicator.parameters:addBoolean("Absolute", "Absolute", "", false); indicator.parameters:addGroup("Style"); indicator.parameters:addColor("Up", "Up Line Color", "", core.rgb(0, 255, 0)); indicator.parameters:addColor("Down", "Down Line Color", "", core.rgb(255, 0, 0)); indicator.parameters:addColor("Neutral", "Neutral Line Color", "", core.rgb(255 ,128, 0)); indicator.parameters:addInteger("style", "Line Style", "", core.LINE_SOLID); indicator.parameters:setFlag("style", core.FLAG_LEVEL_STYLE); indicator.parameters:addInteger("width", "Line Width", "", 3, 1, 5); indicator.parameters:addGroup("OB/OS Levels"); indicator.parameters:addDouble("overbought", "Overbought Level","", 0.38); indicator.parameters:addDouble("oversold","Oversold Level","", -0.38); indicator.parameters:addColor("level_overboughtsold_color", "Line Color","", core.rgb(128, 128, 128)); indicator.parameters:addInteger("level_overboughtsold_width","Line width","", 1, 1, 5); indicator.parameters:addInteger("level_overboughtsold_style", "Line Style","", core.LINE_SOLID); 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 Length; local first; local source = nil; local srsi; local Value1; local Value2; local Value3; local Absolute; -- Routine function Prepare(nameOnly) Length = instance.parameters.Length; Absolute = instance.parameters.Absolute; local Parameters= Length; local name = profile:id() .. "(" .. instance.source:name() .. ")"; instance:name(name); if (nameOnly) then return; end source = instance.source; first=source:first(); Value1= instance:addInternalStream(0, 0); Value2= instance:addInternalStream(0, 0); Value3= instance:addInternalStream(0, 0); srsi = instance:addStream("srsi" , core.Line, " srsi"," srsi",instance.parameters.Neutral, source:first()+Length); srsi:setWidth(instance.parameters.width); srsi:setStyle(instance.parameters.style); srsi:setPrecision(math.max(2, source:getPrecision())); srsi:addLevel(instance.parameters.oversold, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color); srsi:addLevel(instance.parameters.overbought, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color); srsi:addLevel(0, instance.parameters.level_overboughtsold_style, instance.parameters.level_overboughtsold_width, instance.parameters.level_overboughtsold_color); end -- Indicator calculation routine function Update(period ) if period < source:first() then return; end Value1[period] = (source.close[period] - source.open[period]) ; if Absolute then Value1[period]=math.abs(Value1[period]); end Value2[period] = source.high[period] - source.low[period] ; if Value2[period] == 0 then Value3[period] = 0; else Value3[period] = Value1[period]/Value2[period] ; end if period < source:first()+Length then return; end srsi[period]=mathex.sum(Value3, period-Length+1,period)/Length ; if srsi[period] >= -0.05 and srsi[period] <= 0.05 then srsi:setColor(period, instance.parameters.Neutral); elseif srsi[period] > 0 then srsi:setColor(period, instance.parameters.Up); elseif srsi[period] < 0 then srsi:setColor(period, instance.parameters.Down); end end