Average entry price line for multiple positions (exist and the pending positions,too)

I have an avg price indicator wich shows a thick line at the average entry price.

this line exactly same as the initial opening price at the first position,

and shifting towards between the more new positions, showing the cummulated new average price of the all positions. (untill the close.)

all of this is a very simple code ~40 rows,

• but it have a problem:
  something make slowly the MT4.
  the first part of the job:
  fix this bug which makes it slowlier..

and the second part is:

• I would like a new function:
  when I place a pending order, then appear a new line (a dotted with same colour) showing the estimated average price with the new pending (limit or stop) order position.
  so the indicator always shows a dotted line, when I place a pending order, and a thick line, when I have already opened positions, too..

#property indicator_chart_window
#property indicator_buffers 1
#property indicator_color1 Coral

int gi_76 = 25;
double gda_80[];

int init() {
   SetIndexStyle(0, DRAW_LINE);
   SetIndexBuffer(0, gda_80);
   SetIndexDrawBegin(0, gi_76);
   return (0);
}

int start() {
   int li_4;
   bool li_32;
   int li_12 = IndicatorCounted();
   double ld_16 = 0;
   double ld_24 = 0;
   if (Bars <= gi_76) return (0);
   if (li_12 < 1) for (int li_8 = 0; li_8 <= gi_76; li_8++) gda_80[Bars - li_8] = EMPTY_VALUE;
   int li_36 = Bars - li_12;
   for (li_8 = Bars; li_8 >= 0; li_8--) {
      li_32 = FALSE;
      li_4 = OrdersTotal();
      ld_24 = 0;
      ld_16 = 0;
      if (li_4 > 0) {
         for (int li_0 = 0; li_0 < li_4; li_0++) {
            OrderSelect(li_0, SELECT_BY_POS, MODE_TRADES);
            if (OrderSymbol() == Symbol()) {
               if (OrderType() == OP_BUY || OrderType() == OP_SELL) {
                  li_32 = TRUE;
                  ld_24 += OrderLots();
                  ld_16 += OrderOpenPrice() * OrderLots();
               }
            }
         }
      }
      if (li_32 && ld_24 != 0.0) {
         Comment("\n\nLOTs = " + DoubleToStr(ld_24, 4) + " | AVG price = " + DoubleToStr(ld_16 / ld_24, 4) + "   -- (c)");
         gda_80[li_8] = ld_16 / ld_24;
      } else {
         Comment("\n\nLOTs = 0 | AVG price = -,  (c)");
         gda_80[li_8] = EMPTY_VALUE;
      }
   }
   return (0);
}