-- More information about this indicator can be found at: -- http://fxcodebase.com/code/viewtopic.php?f=17&t=42662 --+------------------------------------------------------------------+ --| Copyright © 2020, Gehtsoft USA LLC | --| http://fxcodebase.com | --+------------------------------------------------------------------+ --| Support our efforts by donating | --| Paypal: https://goo.gl/9Rj74e | --+------------------------------------------------------------------+ --| Developed by : Mario Jemic | --| mario.jemic@gmail.com | --| https://AppliedMachineLearning.systems | --| Patreon : https://goo.gl/GdXWeN | --+------------------------------------------------------------------+ function Init() indicator:name("Difference"); indicator:description("Difference"); indicator:requiredSource(core.Tick); indicator:type(core.Oscillator); indicator.parameters:addGroup("Calculation"); indicator.parameters:addBoolean("Absolute", "Absolute", "Absolute" , true); indicator.parameters:addGroup("Style"); indicator.parameters:addColor("color", "Line Color", "Line Color", core.rgb(255, 0, 0)); indicator.parameters:addInteger("width", "Line width", "", 1, 1, 5); indicator.parameters:addInteger("style", "Line style", "", core.LINE_SOLID); indicator.parameters:setFlag("style", core.FLAG_LINE_STYLE); indicator.parameters:addGroup("Vertical Line Style"); indicator.parameters:addColor("Color", "Line Color", "", core.rgb(255, 0, 0)); indicator.parameters:addInteger("Width", "Line width", "", 1, 1, 5); indicator.parameters:addInteger("Style", "Line style", "", core.LINE_SOLID); indicator.parameters:setFlag("Style", core.FLAG_LINE_STYLE); end -- Indicator instance initialization routine -- Processes indicator parameters and creates output streams -- TODO: Refine the first period calculation for each of the output streams. -- TODO: Calculate all constants, create instances all subsequent indicators and load all required libraries -- Parameters block local first; local source = nil; -- Streams block local AV = nil; local Absolute; local pattern = "([^;]*);([^;]*)"; local db; local Flag; local Data; local EndPeriod; local Last; -- Routine function Prepare(nameOnly) source = instance.source; Absolute=instance.parameters.Absolute; first = source:first() ; local name = profile:id() .. "(" .. source:name() .. ", " .. (not Absolute and "Relative" or "Absolute") .. ")"; instance:name(name); if (nameOnly) then return; end Color=instance.parameters.Color; Width=instance.parameters.Width; Style=instance.parameters.Style; Flag= false; Data=nil; EndPeriod=nil; AV = instance:addStream("AV", core.Line, name, "Difference", instance.parameters.color, first); AV:setPrecision(math.max(2, instance.source:getPrecision())); AV:setWidth(instance.parameters.width); AV:setStyle(instance.parameters.style); AV:addLevel(0); core.host:execute("addCommand", 1, "Select End Point"); require("storagedb"); db = storagedb.get_db(name); instance:ownerDrawn(true); core.host:execute("setTimer", 10, 1); end function ReleaseInstance() core.host:execute("killTimer", 10); end -- Indicator calculation routine -- TODO: Add your code for calculation output values function Update(period) if period < first or Data== nil then return; end EndPeriod = core.findDate (source, Data, false); for i= first, source:size()-1 ,1 do if Absolute then AV[i] = math.abs(source[i]-source[EndPeriod]); else AV[i] = source[i]-source[EndPeriod]; end end end function AsyncOperationFinished(cookie, success, message) if cookie== 1 then local Level, Date = string.match(message, pattern, 0); db:put("Date" , tostring(Date)); elseif cookie == 10 then Data= db:get ("Date", 0); end return core.ASYNC_REDRAW ; end local init = false; function Draw(stage, context) if stage~= 2 or EndPeriod == nil then return; end if not init then init = true; context:createPen (1, context:convertPenStyle (Style ), context:pointsToPixels (Width ), Color ) end x, x1, x2 = context:positionOfBar (EndPeriod) context:drawLine (1, x, context:top (), x, context:bottom ()); end