Currencies involved in a symbol (base, profit, margin)

void GetNewsCurrencies(string symbol, string &currencies[])
{
   string base   = SymbolInfoString(symbol, SYMBOL_CURRENCY_BASE);
   string profit = SymbolInfoString(symbol, SYMBOL_CURRENCY_PROFIT);
   string margin = SymbolInfoString(symbol, SYMBOL_CURRENCY_MARGIN);

   ArrayResize(currencies, 0);
   string candidates[3];
   candidates[0] = base; candidates[1] = profit; candidates[2] = margin;

   string majors = "USD,EUR,GBP,JPY,CHF,CAD,AUD,NZD,CNY";
   for(int i = 0; i < 3; i++)
   {
      // Garder uniquement les vraies devises, dédupliquées
      if(StringFind(majors, candidates[i]) < 0) continue;
      bool dup = false;
      for(int j = 0; j < ArraySize(currencies); j++)
         if(currencies[j] == candidates[i]) { dup = true; break; }
      if(!dup)
      {
         int n = ArraySize(currencies);
         ArrayResize(currencies, n + 1);
         currencies[n] = candidates[i];
      }
   }
}