-- Id: 19822 -- More information about this indicator can be found at: -- http://fxcodebase.com/code/viewtopic.php?f=17&t=65402 --+------------------------------------------------------------------+ --| Copyright © 2018, Gehtsoft USA LLC | --| http://fxcodebase.com | --+------------------------------------------------------------------+ --| Support our efforts by donating | --| Patreon : https://goo.gl/GdXWeN | --| Paypal : https://goo.gl/9Rj74e | --| BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF | --| BitCoin Cash : 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg | --| Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D | --| LiteCoin : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD | --+------------------------------------------------------------------+ function Init() indicator:name("Wilders DMI indicator"); indicator:description("Wilders DMI indicator"); indicator:requiredSource(core.Bar); indicator:type(core.Oscillator); indicator.parameters:addGroup("Calculation"); indicator.parameters:addInteger("ADXPeriod", "ADX Period", "", 13); indicator.parameters:addDouble("Level", "Level", "", 21); indicator.parameters:addBoolean("DMI_Only", "Show DMI only", "", false); indicator.parameters:addGroup("Style"); indicator.parameters:addColor("DIPclr", "DIP Color", "DIP Color", core.rgb(0, 255, 0)); indicator.parameters:addColor("DIMclr", "DIM Color", "DIM Color", core.rgb(255, 0, 0)); indicator.parameters:addColor("ADXclr", "ADX Color", "ADX Color", core.rgb(0, 0, 255)); end local first; local source = nil; local ADXPeriod; local Level; local DMI_Only; local DIP, DIM, ADX; local wDIP, wDIM, wTR; local sf; function Prepare(nameOnly) source = instance.source; ADXPeriod=instance.parameters.ADXPeriod; Level=instance.parameters.Level; DMI_Only=instance.parameters.DMI_Only; first = source:first()+2; sf=(ADXPeriod-1)/ADXPeriod; local name = profile:id() .. "(" .. source:name() .. ")"; instance:name(name); if nameOnly then return; end wDIP = instance:addInternalStream(first, 0); wDIM = instance:addInternalStream(first, 0); wTR = instance:addInternalStream(first, 0); DIP = instance:addStream("DIP", core.Line, name .. ".DIP", "DIP", instance.parameters.DIPclr, first); DIP:setPrecision(math.max(2, instance.source:getPrecision())); DIM = instance:addStream("DIM", core.Line, name .. ".DIM", "DIM", instance.parameters.DIMclr, first); DIM:setPrecision(math.max(2, instance.source:getPrecision())); ADX = instance:addStream("ADX", core.Line, name .. ".ADX", "ADX", instance.parameters.ADXclr, first); ADX:setPrecision(math.max(2, instance.source:getPrecision())); end function Update(period, mode) if period>first then local currTR=math.max(source.high[period], source.close[period-1])-math.min(source.low[period], source.close[period-1]); local DeltaHi=source.high[period]-source.high[period-1]; local DeltaLo=source.low[period-1]-source.low[period]; local plusDM=0; local minusDM=0; if DeltaHi>DeltaLo and DeltaHi>0 then plusDM=DeltaHi; end if DeltaLo>DeltaHi and DeltaLo>0 then minusDM=DeltaLo; end wDIP[period]=sf*wDIP[period-1]+plusDM; wDIM[period]=sf*wDIM[period-1]+minusDM; wTR[period]=sf*wTR[period-1]+currTR; DIP[period]=0; DIM[period]=0; if wTR[period]>0 then DIP[period]=100*wDIP[period]/wTR[period]; DIM[period]=100*wDIM[period]/wTR[period]; end local DX; if DIP[period]+DIM[period]>0 then DX=100*math.abs(DIP[period]-DIM[period])/(DIP[period]+DIM[period]) else DX=0; end ADX[period]=sf*ADX[period-1]+DX/ADXPeriod; end end