--+------------------------------------------------------------------+ --| Copyright © 2016, Gehtsoft USA LLC | --| http://fxcodebase.com | --| Support our efforts by donating | --| Paypal: https://goo.gl/9Rj74e | --+------------------------------------------------------------------+ --| Developed by : Mario Jemic | --| mario.jemic@gmail.com | --| BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF | --+------------------------------------------------------------------+ -- Indicator profile initialization routine -- Defines indicator profile properties and indicator parameters -- TODO: Add minimal and maximal value of numeric parameters and default color of the streams function Init() indicator:name("Trend Line Helper"); indicator:description("Trend Line Helper"); indicator:requiredSource(core.Bar); indicator:type(core.Indicator); indicator.parameters:addGroup("1. Point"); indicator.parameters:addDouble("Level1", "1. Point Level", "", 0); indicator.parameters:addDate ("Date1", "1. Point Date", "Date", 0); indicator.parameters:setFlag ("Date1",core.FLAG_DATETIME); indicator.parameters:addGroup("2. Point"); indicator.parameters:addDouble("Level2", "2. Point Level", "", 0); indicator.parameters:addDate ("Date2", "2. Point Date", "Date", 0); indicator.parameters:setFlag ("Date2",core.FLAG_DATETIME); indicator.parameters:addBoolean("Extend" , "Extend", "Extend",true); indicator.parameters:addGroup("Style"); indicator.parameters:addColor("color1", "Color of Line", "Color of Line", core.rgb(255, 0, 0)); indicator.parameters:addColor("color2", "Color of Line Extend", "Color of Line", core.rgb(0, 0, 255)); 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; local Level={}; local Date={}; -- Streams block local Line = nil; local Extend; -- Routine function Prepare(nameOnly) source = instance.source; first = source:first(); Level[1]= instance.parameters.Level1; Level[2]= instance.parameters.Level2; Date[1]= instance.parameters.Date1; Date[2]= instance.parameters.Date2; Extend= instance.parameters.Extend; local name = profile:id() .. "(" .. source:name() .. ")"; instance:name(name); if (not (nameOnly)) then Line = instance:addStream("Line", core.Line, name, "Line", instance.parameters.color1, first); Line:setWidth(instance.parameters.width); Line:setStyle(instance.parameters.style); end end -- Indicator calculation routine -- TODO: Add your code for calculation output values function Update(period) if period < source:size()-1 then return; end local p1 = core.host:execute("calculatePositionOfDate", source, Date[1]); local p2 = core.host:execute("calculatePositionOfDate", source, Date[2]); local last = source:size() - 1; if p1 > p2 then Temp=p1; p1= p2; p2=Temp; Start= Level[2]; Stop=Level[1]; else Start= Level[1]; Stop=Level[2]; end core.host:execute ("setStatus", p1.. " / ".. p2) core.drawLine(Line, core.range(p1, p2), Start, p1, Stop, p2, instance.parameters.color1); if Extend then a = (Stop - Start) / (p2 - p1); b = Start - a * p1; Level[3] = a * first + b; Level[4] = a * p1 + b; Level[5] = a * p2 + b; Level[6] = a * (source:size() - 1) + b; core.drawLine(Line, core.range(first, p1) , Level[3], first, Level[4], p1 , instance.parameters.color2); core.drawLine(Line, core.range(p2, source:size()-1), Level[5], p2 , Level[6], source:size() - 1, instance.parameters.color2); end end