Convert ADX EA from MQL4 to MQL5 - 20 lines of code only

Convert this simple lines of MQL4 Code to a MQL5 Expert Advisor:

input int  TakeProfit=3900;//Take profit
input int  StopLoss=500;//Stop Loss

input int MAGIC = 2930;
input double defaultLot = 0.01;
input int period = 13;
input ENUM_APPLIED_PRICE appliedPrice = PRICE_CLOSE;
input int shift = 0;
input int limitUp = 40;

void OnTick()
  {   
   double adx_main = iADX(NULL, 0, period, appliedPrice, MODE_MAIN, shift);
   double adx_plusdi = iADX(NULL, 0, period, appliedPrice, MODE_PLUSDI, shift);
   double adx_minusdi = iADX(NULL, 0, period, appliedPrice, MODE_MINUSDI, shift);
   
   if(countOrders(MAGIC) == 0) {
      if(adx_main > limitUp) {
         double lot = defaultLot;
         if(adx_plusdi > adx_minusdi) {
            Print("Open SELL Lot:"+DoubleToStr(lot)+" - SL:"+IntegerToString(StopLoss)+" -TP:"+IntegerToString(TakeProfit));
            sell(lot, StopLoss, TakeProfit, MAGIC, "");
         } else if(adx_plusdi < adx_minusdi) {
            Print("Open BUY Lot:"+DoubleToStr(lot)+" - SL:"+IntegerToString(StopLoss)+" -TP:"+IntegerToString(TakeProfit));
            buy(lot, StopLoss, TakeProfit, MAGIC, "");
         }
      }
   }
}

Some functions are not included:

- "countOrders" will return the number of executed orders for this specific MAGIC number

- "sell"/"buy" will open a sell/buy order with the specified parameters

So basically, the EA will open an order if there no order already opened, and if:

- the ADX Plus DI is above the ADX Minus DI (sell)

- the ADX Plus DI is below the ADX Minus DI (buy)