-- Id: 13923 -- More information about this indicator can be found at: --http://fxcodebase.com/code/viewtopic.php?f=17&t=62078 --+------------------------------------------------------------------+ --| 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 | --+------------------------------------------------------------------+ -- 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("Bollinger Bandwith Delta"); indicator:description("Bollinger Bandwith Delta"); indicator:requiredSource(core.Tick); indicator:type(core.Oscillator); indicator.parameters:addGroup("Calculation"); indicator.parameters:addInteger("Periods", "Period", "Period", 20); indicator.parameters:addDouble("Deviations", "Deviation", "Deviation", 2); indicator.parameters:addInteger("Delta_Period", "Delta Period", "Period", 20); indicator.parameters:addString("Method", "Delta Method", "Method" , "Pips"); indicator.parameters:addStringAlternative("Method", "Percentage", "Percentage" , "Percentage"); indicator.parameters:addStringAlternative("Method", "Pips", "Pips" , "Pips"); indicator.parameters:addGroup("Style"); indicator.parameters:addColor("Delta_color_Up", "Color of Delta Up", "Color of Delta", core.rgb(0, 255, 0)); indicator.parameters:addColor("Delta_color_Down", "Color of Delta Down", "Color of Delta", core.rgb(255, 0 , 0)); 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 Periods; local Deviations; local Method; local first; local source = nil; local Delta_Period; -- Streams block local Delta = nil; local Bandwith; -- Routine function Prepare(nameOnly) Periods = instance.parameters.Periods; Deviations = instance.parameters.Deviations; Delta_Period = instance.parameters.Delta_Period; Method= instance.parameters.Method; source = instance.source; first = source:first()+Periods; local name = profile:id() .. "(" .. source:name() .. ", " .. tostring(Periods) .. ", " .. tostring(Deviations) .. ", " .. tostring(Method) .. ")"; instance:name(name); if (nameOnly) then return; end Bandwith= instance:addInternalStream(first, 0); Delta = instance:addStream("Delta", core.Bar, name, "Delta", instance.parameters.Delta_color_Up, first+ Delta_Period); Delta:setPrecision(math.max(2, instance.source:getPrecision())); end -- Indicator calculation routine -- TODO: Add your code for calculation output values function Update(period) if period < first or not source:hasData(period) then return; end local Central= mathex.avg(source, period-Periods+1, period); local stdev = mathex.stdev(source, period-Periods+1, period); local TL = Central + Deviations * stdev; local BL = Central - Deviations * stdev; Bandwith[period] = ((TL - BL ) / Central) if period < first + Delta_Period then return; end if Method == "Percentage" then Delta[period] = (Bandwith[period]-Bandwith[period-Delta_Period+1] )/(Bandwith[period-Delta_Period+1]/100); else Delta[period] =(Bandwith[period]-Bandwith[period-Delta_Period+1] )/source:pipSize(); end if Delta[period]> Delta[period-1] then Delta:setColor(period, instance.parameters.Delta_color_Up); else Delta:setColor(period, instance.parameters.Delta_color_Down); end end