-- Id: 2554 -- More information about this indicator can be found at: -- http://fxcodebase.com/code/viewtopic.php?f=17&t=20 --+------------------------------------------------------------------+ --| 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 function Init() indicator:name("Donchian Channel - Bandwidth Oscillator"); indicator:description("Donchian Channel - Bandwidth Oscillator"); indicator:requiredSource(core.Bar); indicator:type(core.Oscillator); indicator.parameters:addInteger("N", "Number of periods", "Number of periods", 20); indicator.parameters:addColor("clrBBB", "Bandwidth Line color", "", core.rgb(0, 255, 0)); end -- Indicator instance initialization routine -- Processes indicator parameters and creates output streams -- Parameters block local N; local first; local source = nil; local BAND; -- Streams block -- Routine function Prepare(nameOnly) N = instance.parameters.N; source = instance.source; first = source:first(); local name = profile:id() .. "(" .. source:name() .. "," .. N .. ")"; instance:name(name); if (nameOnly) then return; end BAND = instance:addStream("Bandwidth", core.Line, name .. ".BANDWIDTH", "Bandwidth", instance.parameters.clrBBB, first); BAND:setPrecision(math.max(2, instance.source:getPrecision())); end -- Indicator calculation routine function Update(period) if period < N or not source:hasData(period) then return; end local min, max; min, max= core.minmax( source , core.range(period-N, period)); BAND[period] = max-min; end