-- Id: 15246 -- This is a port of Waddah_Attar_Explosion.mq4 -- Original indicator Copyright � 2006, Eng. Waddah Attar, waddahattar@hotmail.com -- Indicator profile initialization routine -- Defines indicator profile properties and indicator parameters function Init() indicator:name("Waddah Attar's Explosion Oscillator"); indicator:description(""); indicator:requiredSource(core.Bar); indicator:type(core.Oscillator); indicator.parameters:addInteger("Sen", "Sensitivity", "", 150); indicator.parameters:addInteger("DeadZonePip", "Dead Zone in pips", "", 30); indicator.parameters:addColor("TG_color", "Color of postive trend", "", core.rgb(0, 192, 0)); indicator.parameters:addColor("TR_color", "Color of negative trend", "", core.rgb(192, 0, 0)); indicator.parameters:addColor("E_color", "Color of explosion line", "", core.rgb(128, 64, 0)); end -- Indicator instance initialization routine -- Processes indicator parameters and creates output streams -- Parameters block local Sen; local DeadZonePip; local first; local firstBB; local source = nil; -- Streams block local TG = nil; local TR = nil; local E = nil; local EMAF = nil; local EMAS = nil; local BB_H = nil; local BB_L = nil; -- Routine function Prepare() Sen = instance.parameters.Sen; DeadZonePip = instance.parameters.DeadZonePip; source = instance.source; EMAF = core.indicators:create("EMA", source.close, 20); EMAS = core.indicators:create("EMA", source.close, 40); first = EMAS.DATA:first() + 2; firstBB = source:first() + 20; BB_H = instance:addInternalStream(firstBB, 0); BB_L = instance:addInternalStream(firstBB, 0); local name = profile:id() .. "(" .. source:name() .. ", " .. Sen .. ", " .. DeadZonePip .. ")"; instance:name(name); TG = instance:addStream("TG", core.Bar, name .. ".TG", "TG", instance.parameters.TG_color, first); TG:setPrecision(math.max(2, instance.source:getPrecision())); TR = instance:addStream("TR", core.Bar, name .. ".TR", "TR", instance.parameters.TR_color, first); TR:setPrecision(math.max(2, instance.source:getPrecision())); E = instance:addStream("E", core.Line, name .. ".E", "E", instance.parameters.E_color, first); E:setPrecision(math.max(2, instance.source:getPrecision())); E:addLevel(0); E:addLevel(DeadZonePip * source:pipSize()); end -- Indicator calculation routine function Update(period, mode) EMAF:update(mode); EMAS:update(mode); if period >= firstBB then local p = core.rangeTo(period, 20); local ml = core.avg(source.close, p); local d = core.stdev(source.close, p); BB_H[period] = ml + 2 * d; BB_L[period] = ml - 2 * d; end if period >= first then local trend, explosion; trend = (MACD(period) - MACD(period - 1)) * Sen; explosion = BB_H[period] - BB_L[period]; if trend > 0 then TG[period] = trend; TR[period] = 0; elseif trend < 0 then TG[period] = 0; TR[period] = -trend; end E[period] = explosion; end end function MACD(period) return EMAF.DATA[period] - EMAS.DATA[period]; end