need add a custom indicator to my EA

Please add indicator BBflat to the EA at below as highlighted

if(bartime != Time[0])

   {

      p = 0;

      side = 0;

      sl = 0;

      dStochK4h1 = iStochastic(Symbol(), PERIOD_H4, 5, 3, 3, 0, 0, MODE_MAIN, 0);

      dStochK4h2 = iStochastic(Symbol(), PERIOD_H4, 5, 3, 3, 0, 0, MODE_MAIN, 1);

      dStochD4h = iStochastic(Symbol(), PERIOD_H4, 5, 3, 3, 0, 0, MODE_SIGNAL, 0);

      Oversell_Level = iCustom(Symbol(), PERIOD_H4, "Stoch_Alert", 0, 1);

      Overbuy_Level = iCustom(Symbol(), PERIOD_H4, "Stoch_Alert", 0, 1);

Indicator PERIOD_H4 BBflat

      if((v1[0] <= Oversell_Level && OBOS != -1) && (dStochK4h1 > dStochK4h2 && dStochK4h1 > dStochD4h && dStochK4h1 >= 20 && dStochK4h1 <= 80) &&

When indicator_color4 Blue upward crossover the indicator_color3 Red)

      {

         iTrend = 1;

      }

      if((v1[0] <= Oversell_Level && OBOS != -1) && (dStochK4h1 < dStochK4h2 && dStochK4h1 < dStochD4h && dStochK4h1 <= 80 && dStochK4h1 >= 20) &&

When indicator_color4 Blue downward crossover the indicator_color2 Red)

      {

         iTrend = -1;

      }